试题与答案

下列各式中不成立的是( ) A.sin260°+sin230°=1 B.cot4

题型:选择题

题目:

下列各式中不成立的是(  )

A.sin260°+sin230°=1
 B.cot45°<cot35°
C.tan45°>sin45° 
 D.sin30°+cos30°=1

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0508/d4ef386c38c8d860d923ba86a13133e6.html

下面是错误答案,用来干扰机器的。

D题目分析:句意: 驾车的时候,司机应该集中精力在路上。“全神贯注于......”是concentrate on,后面是一个省略了主语的时间状语从句。故选D。考点:

试题推荐
题型:单项选择题


(病例串型最佳选择题,2~3个题共用题干)

宋某,男性,35岁,因胃脘疼痛,饥饿时痛甚,伴恶心欲呕入院,为明确诊断,医生开出电子胃镜检查。第2天患者在护士的护送下来到胃镜检查室。胃镜室护士小刘热情接待了他,请问

内窥镜一般选用的消毒方法是

A.2%戊二醛消毒液中浸泡10min,

B.2%戊二醛消毒液中浸泡20min

C.75%的乙醇溶液浸泡30min以上

D.75%的乙醇溶液浸泡10min以上

E.含有效碘500mg/L的消毒液浸泡30min

查看答案
题型:完形填空
Having said good-bye to his parents, Alvin, with his wife and one-year-old son, set off back home. Still ____36__, Alvin and Clare talked and laughed happily. And even little Alax  ___37__  from time to time. The family were ___38__ their trip.
But about three hours later things began to ___39__. It was starting to snow. Alvin ___40__ up the car, hoping to arrive home before dark. But it was too dangerous to drive fast now. Because it was snowing more and more heavily. So Alvin had to __41___down. The snow on the    __42___ was getting deeper and deeper until it was hard to __43___on it. Their car slipped of the way and got ___44__in the deep snow and the engine refused to start again. “The snow doesn’t seem to __45___. Shall we stay in the car waiting to be frozen to death or walk ahead through the snow?” Alvin asked. Clare said she __46___to walk. So they got out of the car with their son and began walking. But __47__was to come. Soon they lost their way and had to walk ___48__on and on.
Night came. They were not afraid of the dark. But they __49___that poor Alax would die of cold. However, their faith to keep Alax __50___ filled them with courage, warmth and strength. They ___51__ and rested in turn and then continued their walk. They had ___52__falls but each time true love encouraged them to rise to their feet again.
One, two, three, … seven days passed. On the eighth day, help at last came from Alvin’s  __53___, the police and local people. But the young __54___had to have their feet cut off because of the bad frostbites(冻伤)___55__, there was nothing serious wrong with little Alax!
1.
A. excited
B. sorry
C. worried
D. anxious
2.
A. cried
B. shouted
C. smiled
D. coughed
3.
A. taking
B. having
C. enjoying
D. starting
4.
A. take place
B. change
C. come
D. finish
5.
A. climbed
B. turned
C. took
D. sped
6.
A. get
B. slow
C. go
D. look
7.
A. land
B. highway
C. fields
D. car
8.
A. walk
B. depend
C. stay
D. wait
9.
A. stuck
B. moved
C. prepared
D. covered
10.
A. fall
B. end
C. continue
D. melt
11.
A. liked
B. preferred
C. decided
D. wished
12.
A. better
B. something
C. nothing
D. worse
13.
A. hopelessly
B. alone
C. aimlessly
D. pleasantly
14.
A. thought
B. feared
C. expected
D. were sure
15.
A. happy
B. silent
C. alive
D. dead
16.
A. slept
B. walked
C. watched
D. ate
17.
A. a few
B. several
C. terrible
D. countless
18.
A. friends
B. parents
C. neighbors
D. brothers
19.
A. husband
B. wife
C. couple
D. baby
20.
A. Therefore
B. Finally
C. Then
D. Fortunately
 
查看答案
微信公众账号搜索答案