题目内容
（请给出正确答案）
We are wasting precious time sitting around here.
A．valuable
B．leisure
C．spare
D．previous
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更多“We are wasting precious time s…”相关的问题
A．to have lectures on the subject
B．to deal with this problem now
C．to find ways of recycling it
—I'm afraid we can't have him______the paper in this way.
—We should have him______at once. I think.
[A] waste; scolding
[B] wasting; scolded
[C] wasted; scold
[D] waste; to scold
听力原文：W: I have to think about your offer. I can't say "yes" or "no" at the moment.
M: You can take your time. It will do if you let me know your decision in a day or two.
Q: What do we learn from the conversation？
(15)
A．The man thinks the woman is wasting her time.
B．The man thinks the woman should save her time.
C．The man is eager to know the woman's answer.
D．The man can wait and the woman need not hurry.
The [Ag+] of a solution is 4.0×10-5. Calculate the [Cl-] that must be exceeded before AgCl can precipitate.
【T13】
A.ALL OF THAT
B.AS IF IT WERE
C.FRESH WATER SUPPLY
D.IN THIS FIELD A.A LIMITED【T13】______
B.SO THAT IT CAN BE USED AGAIN JUST【T14】______FROM A SPRING
C.AND WE CANNOT EVEN USE【T15】______
D.EXPERIMENTS HAVE ALREADY BEEN DONE【T16】______ THE WORLD IS NOT ONLY HUNGRY, IT IS ALSO THIRSTY FOR WATER. IT SEEMS THERE IS PLENTY OF WATER, BUT ABOUT 97% OF THIS HUGE AMOUNT IS SEA-WATER, OR SALT WATER. MAN CAN ONLY DRINK AND USE THE OTHER 3% FRESH WATER.【T17】______, BECAUSE SOME OF IT IS IN THE FORM. OF ICEBERGS AND GLACIERS. EVEN WORSE, SOME OF IT HAS BEEN POLLUTE
D. AT THE MOMENT, HIS SMALL AMOUNT OF FRESH WATER IS STILL ENOUGH FOR US. HOWEVER, OUR NEED FOR WATER IS INCREASING RAPIDLY. ONLY IF WE TAKE STEPS TO DEAL WITH THIS PROBLEM NOW, CAN WE AVOID A SEVERE WORLDWIDE WATER SHORTAGE LATER O
N. ONE OF THE USEFUL STEPS WE CAN TAKE IS TO STOP UNLIMITED USE OF WATER.【T18】______, HOWEVER, WOULD HAVE A BAD EFFECT ON AGRICULTURE AND INDUSTRY. IN ADDITION TO STOPPING WASTING OUR PRECIOUS WATER, ONE MORE USEFUL STEP WE SHOULD TAKE IS TO DEVELOP WAYS OF REUSING IT.【T19】______, BUT ONLY ON A SMALL SCAL
E. TODAY, IN MOST LARGE CITIES, WATER IS USED ONLY ONCE AND IT EVENTUALLY RETURNS TO THE SEA OR RUNS INTO UNDERGROUND STORAGE TANKS. BUT IT IS POSSIBLE TO PIPE WATER THAT HAS BEEN USED TO A PURIFYING PLANT. THERE IT CAN BE FILTERED AND TREATED WITH CHEMICALS【T20】______.
【T15】
A. ALL AF THAT
B. AS IF IT WERE
C. FRESH WATER SUPPLY
D. IN THIS FIELD A. A LIMITED【T13】______
B. SO THAT IT CAN BE USED AGAIN JUST【T14】______ FROM A SPRING
C. AND WE CANNOT EVEN USE【T15】______
D. EXPERIMENTS HAVE ALREADY BEEN DONE【T16】______ THE WORLD IS NOT ONLY HUNGRY, IT IS ALSO THIRSTY FOR WATER. IT SEEMS THERE IS PLENTY OF WATER, BUT ABOUT 97% OF THIS HUGE AMOUNT IS SEA-WATER, OR SALT WATER. MAN CAN ONLY DRINK AND USE THE OTHER 3% FRESH WATER.【T17】______ , BECAUSE SOME OF IT IS IN THE FORM. OF ICEBERGS AND GLACIERS. EVEN WORSE, SOME OF IT HAS BEEN POLLUTE
D. AT THE MOMENT, HIS SMALL AMOUNT OF FRESH WATER IS STILL ENOUGH FOR US. HOWEVER, OUR NEED FOR WATER IS INCREASING RAPIDLY. ONLY IF WE TAKE STEPS TO DEAL WITH THIS PROBLEM NOW, CAN WE AVOID A SEVERE WORLDWIDE WATER SHORTAGE LATER O
N. ONE OF THE USEFUL STEPS WE CAN TAKE IS TO STOP UNLIMITED USE OF WATER.【T18】______ , HOWEVER, WOULD HAVE A BAD EFFECT ON AGRICULTURE AND INDUSTRY. IN ADDITION TO STOPPING WASTING OUR PRECIOUS WATER, ONE MORE USEFUL STEP WE SHOULD TAKE IS TO DEVELOP WAYS OF REUSING IT.【T19】______ , BUT ONLY ON A SMALL SCAL
E. TODAY, IN MOST LARGE CITIES, WATER IS USED ONLY ONCE AND IT EVENTUALLY RETURNS TO THE SEA OR RUNS INTO UNDERGROUND STORAGE TANKS. BUT IT IS POSSIBLE TO PIPE WATER THAT HAS BEEN USED TO A PURIFYING PLANT. THERE IT CAN BE FILTERED AND TREATED WITH CHEMICALS【T20】______
【T19】
A. ALL AF THAT
B. AS IF IT WERE
C. FRESH WATER SUPPLY
D. IN THIS FIELD A. A LIMITED【T13】______
B. SO THAT IT CAN BE USED AGAIN JUST【T14】______ FROM A SPRING
C. AND WE CANNOT EVEN USE【T15】______
D. EXPERIMENTS HAVE ALREADY BEEN DONE【T16】______ THE WORLD IS NOT ONLY HUNGRY, IT IS ALSO THIRSTY FOR WATER. IT SEEMS THERE IS PLENTY OF WATER, BUT ABOUT 97% OF THIS HUGE AMOUNT IS SEA-WATER, OR SALT WATER. MAN CAN ONLY DRINK AND USE THE OTHER 3% FRESH WATER.【T17】______ , BECAUSE SOME OF IT IS IN THE FORM. OF ICEBERGS AND GLACIERS. EVEN WORSE, SOME OF IT HAS BEEN POLLUTE
D. AT THE MOMENT, HIS SMALL AMOUNT OF FRESH WATER IS STILL ENOUGH FOR US. HOWEVER, OUR NEED FOR WATER IS INCREASING RAPIDLY. ONLY IF WE TAKE STEPS TO DEAL WITH THIS PROBLEM NOW, CAN WE AVOID A SEVERE WORLDWIDE WATER SHORTAGE LATER O
N. ONE OF THE USEFUL STEPS WE CAN TAKE IS TO STOP UNLIMITED USE OF WATER.【T18】______ , HOWEVER, WOULD HAVE A BAD EFFECT ON AGRICULTURE AND INDUSTRY. IN ADDITION TO STOPPING WASTING OUR PRECIOUS WATER, ONE MORE USEFUL STEP WE SHOULD TAKE IS TO DEVELOP WAYS OF REUSING IT.【T19】______ , BUT ONLY ON A SMALL SCAL
E. TODAY, IN MOST LARGE CITIES, WATER IS USED ONLY ONCE AND IT EVENTUALLY RETURNS TO THE SEA OR RUNS INTO UNDERGROUND STORAGE TANKS. BUT IT IS POSSIBLE TO PIPE WATER THAT HAS BEEN USED TO A PURIFYING PLANT. THERE IT CAN BE FILTERED AND TREATED WITH CHEMICALS【T20】______
