环氧乙烷在空气中的爆炸范围为(体积百分比)()。A、50%~100% B、30%~1

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问题:

环氧乙烷在空气中的爆炸范围为(体积百分比)()。

A、50%~100%

B、30%~100%

C、3%~90%

D、3%~100%

考点:环氧乙烷乙二醇装置操作工环氧乙烷乙二醇装置操作工(初级)环氧乙烷
题型:单项选择题
完形填空
In the United States, headmasters and teachers discipline (惩戒) students in several ___1__. The teacher often writes or calls the student’s ___2___.
Sometimes students have to stay at school for an extra hour. If a student behaves very ___3___,the headmaster can suspend (暂停学生上课) the student. The student cannot ___4___ for one, two, or three days. Mr. Lazares didn’t like to suspend students. When he suspended some students, they were ___5___. “A three-day holiday!” they thought. One day, a boy named Robert was in Mr. Lazares’s office. The boy was not behaving well in class. Mr. Lazares telephoned the boy’s parents. “If you come to school with your son, I won’t ___6___ him,” he said. The boy’s father came to school and went with his son to every class.Other students___7___ the boy and his father. The boy was embarrassed. After that, he behaved ___8___. He didn’t want his father to come to school again. Other students behaved better, ___9___. They thought, “I don’t want my parents to come to school!”
That year about 60 parents came to school with children who didn’t behave well. The next year only ___10___ parents had to come to school. The students were behaving better.
小题1:A. A. streets       B. roads      C. ideas      D. ways
小题2:
A.parents   B.friends   C.uncles   D.elder brother
小题3:
A.well   B.poor   C.politelyD.badly
小题4:
A.have meals  B.come to schoolC.come home D.go to sleep
小题5:
A.happy   B.sorry   C.sad   D.worried
小题6:
A.beat   B.suspendC.kick    D.laugh at
小题7:
A.stared at (盯着看)B.waited for C.played with D.welcomed
小题8:
A.worse   B.better   C.more  D.carefully
小题9:
A.also   B.either   C.too  D.neither
小题10:
A.lots of  B.more   C.all   D.a few
题型:单项选择题

采用负荷实验评价成人维生素B1营养状态时

维生素B1经口给予的剂量为

A.3mg

B.4mg

C.5mg

D.8mg

E.10mg

题型:单项选择题

为患者做腹部触诊,正确方法是()。

A.站在患者右侧,便于触诊

B.嘱患者仰卧,两腿屈曲

C.面对患者,观察其表情

D.由无痛部位逐渐到患部

E.触诊力量由重到轻

题型:单项选择题

使用循环水有哪些优点?

题型:单项选择题

以下是我国海关对进出口关税的计征标准的描述,请指出正确的句子。()

A.从价税是指以课税对象的价格或价值为计税标准所征收的关税

B.从量税是指以课税对象的数量和重量为计税标准所征收的关税

C.复合税是指以课税对象的从价税率和从量税率混合所征收的关税

D.滑准税是指根据课税对象价格的变化设置高低不同的税率所征收的关税,即课税对象的价格越低,其进口的关税税率越低;反之,其进口关税税率就越高

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