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【判断题】
磁粉检测难以发现埋藏较深的孔洞，以及与工件表面夹角大于20°的分层。（）A.
正确
B.
错误
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举一反三
【单选题】According to the study of the effects of getting laid-off, we can learn that
A.
unemployment can damage economic growth.
B.
the laid-off workers are usually forced to quit their jobs.
C.
35% of laid-off workers are not willing to be engaged in social activities.
D.
workers who were forced to lose jobs might refrain from social activities in their future life.
【简答题】设f（x）=log a g（x）（a＞0且a≠1） （1）若 f(x)=lo g 1 2 (3x-1) ，且满足f（x）＞1，求x的取值范围； （2）若g（x）=ax 2 -x，是否存在a使得f（x）在区间[ 1 2 ，3]上是增函数？如果存在，说明a可以取哪些值；如果不存在，请说明理由． （3）定义在[p，q]上的一个函数m（x），用分法T：p=x 0 ＜x 1 ＜…＜x i-1 ＜x i ＜…...
【单选题】From the passage we can learn that .
A.
society has been influenced by science fiction more in direct ways
B.
communications and transportation are usually impacted indirectly by science fiction
C.
science fiction has no direct negative influence upon society
D.
science fiction has influenced society both in technological and cultural areas
【简答题】设f（x）是定义在[a，b]上的函数，用分点T：a=x 0 ＜x 1 ＜…＜x i﹣1 ＜x i ＜…x n =b 将区间[a，b]任意划分成n个小区间， 如果存在一个常数M＞0，使得 和 ≤M（i=1，2，…，n）恒成立， 则称f（x）为[a，b]上的有界变差函数． （1）函数f（x）=x 2 在[0，1]上是否为有界变差函数？请说明理由； （2）设函数f（x）是[a，b]上的单调递减函数，证明...
【单选题】We can learn from the passage that______.
A.
American films are mostly poor comedies
B.
it is good manners to wear blue jeans to a wedding
C.
Americans usually wear formal clothes in a theater
D.
to dress formally makes others feel you are not easy to get on with
【单选题】We can learn from the text that
A.
public visitors intended to reap great profits in the fair.
B.
some countries initially hesitated to support the project.
C.
technological progress usually precedes an economic boom.
D.
sponsoring corporations once dismissed the technology.
【简答题】(P79) 为吾子之将行也,郑之有【原圃】。 原圃: 7.(P79) 奉不可失,敌不可【纵】。 纵: 8.(P80 )武夫力而【拘】诸【原】。 拘:; 原: 9.(P80 )若【从君惠】而免之。 从君惠: 10.(P83 )(2017.4词28)使人【属】孟尝君,愿寄食门下。 属:
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