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【简答题】
阅读理解。 Tom and Jim are brothers. They are from Australia. Tom is 14 years old and Jim is 13 years old. They speak English and French. Today they are in China. Now they are living in China. Their home is across from a park. There are five people in their fa mily. They are their parents, their sister and them. Their mother is a teacher. Their father is a doctor. Their sister is very young. She doesn’t go to school. She goes to a kindergarten(幼儿园). They say China is a very interesting country. They like China. 1 Tom is from ______. A. America B. Canada C. Australia D.UK 2. Tom and Jim speak ______. A. Chinese and English B. English and French C. Chinese and Japanese D. French and Japanese 3. There are __ people in Tom’s family A. 3. B. 4. C. 5. D.6 4. Jim’s father is a ______. A. doctor B. teacher C. writer D.farmer 5. Why do they like China? A. Because they think Chinese food is nice. B. Because they like Chinese people. C. Because they think China is an interesting country. D. We don’t know.
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举一反三
【判断题】金属材料的上屈服点是指金属试样在拉伸过程中发生屈服而首次下降前的最大应力,下屈服点是指在拉伸过程中不计初始瞬时效应时屈服阶段中的最小应力。
A.
正确
B.
错误
【判断题】食品中的合成色素可以用聚酰胺粉薄层色谱法进行测定。
A.
正确
B.
错误
【多选题】泥浆护壁成孔灌注桩施工时,护筒的作用是()。
A.
保护钻头
B.
定位和保护孔口
C.
阻隔地下水进入孔内
D.
保证钻进的垂直度
E.
保证泥浆的水头高度
【单选题】熔化极气体保护焊时,亚射流过渡的应用范围只是( )焊铝。
A.
MIG
B.
TIG
C.
MAG
D.
SAW
【单选题】如图所示运算电路,当输入电压ui=1mV时,则输出电压uo为( )。【图片】
A.
运放输出的负饱和值 - u o(sat)
B.
运放输出的正饱和值 u o(sat)
C.
u i 与运放开环放大倍数 A u 的乘积
D.
电源电压 U
【多选题】泥浆护壁成孔灌注桩施工时,泥浆的作用是( )。
A.
保护孔壁
B.
防止塌孔
C.
排出土渣
D.
冷却和润滑钻
【单选题】如图所示运算电路,当输入电压ui=1mV时,则输出电压uo为( A )。【图片】
A.
运放输出的负饱和值 - u o(sat)
B.
u i 与运放开环放大倍数 A u 的乘积
C.
运放输出的正饱和值 u o(sat)
D.
电源电压 U
【判断题】熔化极气体保护焊时,亚射流过渡的应用范围只能用于MIG焊铝。
A.
正确
B.
错误
【单选题】熔化极气体保护焊时,亚射流过渡的应用范围只能用于()焊铝。
A.
MIG
B.
TIG
C.
MAG
D.
SAW
【简答题】写下你听到的内容 根据自己实际情况,改写第一问的内容并背诵
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