关于长江沿岸地带的说法，正确的是[ ] A．下游地区矿产丰富，多发展采掘、机械、

Mr. Wood, _____________ students are here today. [ ]

A. a

B. the all

C. all the

— You’d better not _____ time talking to him. He won’t change his mind.        

— I agree with you. [ ]

A. waste        

B. allow        

C. save          

D. kill

—How is he getting on with his job hunt
—tte was looking for a suitable job all the time,______he has failed.

A. when
B. however
C. yet
D. since

酶促反应动力学研究的是

A．酶分子的空间构象
B．酶的基因来源
C．酶的活性中心
D．酶的电泳行为
E．影响酶促反应速度的因素

瘿病阴虚证有哪几项主症（）

A．心悸不宁 

B．心烦少寐 

C．手指颤动 

D．两目汗涩 

E．头晕目眩