神经-骨骼肌接头处传递兴奋的神经递质是()。
A. 去甲肾上腺素
B. 乙酰胆碱
C. 肾上腺素
D. K+
Ifthecompany________intrainingitsnewstaff,itwouldhaveavoidedmanyofitsporblems.
A. hadinvested
B. invests
C. invested
D. haveinvested
Peoplespeak_____himasthebestknownhumorouswriterofalltimes.
A. to
B. of
C. with
D. for
Itwasbecauseofherpoorhealth_________shewasnotallowedtomakethelongjourney.
A. when
B. what
C. which
D. that