适合湿颗粒干燥的快速、方便的设备是（）。A、箱式干燥器 B、流化床干燥机 C、喷雾干

____the problem, it follows that we must develop a plan of action.

A．Recognizing

B．Having recognized

C．Recognized

D．Having recognizing

毒蕈中毒的临床表现除外哪项()

A.胃肠炎型 

B.神经型 

C.精神异常型 

D.肾小管坏死型 

E.溶血型

在photoshop中有哪些创建规则选区的工具？简述其功能。

酶的催化高效性是因为酶

A．启动热力学不能发生的反应

B．能降低反应的活化能

C．能升高反应的活化能

D．可改变反应的平衡点

E．对作用物(底物)的选择性

We hadn’t realized that there would be a power cut so we were astonished when the whole house was () into darkness.

A. dropped

B. dived

C. drowned

D. plunged