A:played
B:did
C:had
D:took
How much money does the man have before anyone lends him money?
1978年,思想理论界展开了一场关于真理标准问题的讨论,其答案是( )
图中所示电阻箱两接线柱间的电阻值为____ Ω。
下列各项中,属于激素调节的是( )