慢性肺源性心脏病发病的主要因素，下列哪项不恰当A．肺血管阻力增加 B．气道梗阻 C．

发生医疗废物流失、泄漏、扩散事件，未及时向县卫生局报告，县卫生局发现后给予责令改正，给予警告，并处2万元罚款。（）

短文填词

As we all know,  most of the students feel nervous when taking

an exam.There is no________(疑问) that exams

are important to us,  but it's m________important to

have a right attitude towards them.As a matter of fact,  exams

are no more than________means of evaluating.Why

worry about the results? Only________studying hard

every day and________(准备) for exams in advance

can we avoid suffering from the________(压力)

of exams.We'd better go out for a walk________do

some outdoor exercise before exams.Besides,  having enough sleep

canf________us with energy and make it possible

for us to________well in the exam.A hot bath or 

a cup of hot milk may help those________(感觉)

stressed out before an exam.

钢筋混凝土灌注桩施工时，应先进行“试成孔”检查，一般试孔桩数量为每个场地不少于（）。

A.1

B.2

C.3

D.4