A book of original entry is known as______.
A.a ledger account
B.a journal
C.a general ledger
D.a trial balance
From the passage, we know that man must ______.
A.do nothing to keep the balance (平衡)of nature
B.try his best to change the balance of nature
C.try his best to keep the balance of nature
D.do his best to stop the balance of nature
uch information from the environment as possible.
A.absord
B.involve
C.invent
D.conquer
A.手机和BTS的灵敏度相同
B.手机和BTS的路径损耗相同
C.手机和BTS的天线损耗相同
D.手机和BTS的合路器损耗相同
此题为判断题(对,错)。