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【判断题】
在一个轨道上运转的天空实验室中,宇航员处于失重状态,可以用天平来称他的重量。()A.
正确
B.
错误
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举一反三
【简答题】a___________ n. the act of finishing sth. completely and successfully 2. a___________ v. to gain 3. a___________ v. to take as a fact 4. b___________ n. (infml) a very tall and thin person 5. c_______...
【简答题】a___________ n. the act of finishing sth. completely and successfully 2. a___________ v. to gain 3. a___________ v. to take as a fact 4. b___________ n. (infml) a very tall and thin person 5. c_______...
【单选题】When was dry ice first made?
A.
In the 1920s.
B.
In the 1930s.
C.
In the 1940s.
D.
In the 1950s.
【多选题】钢的退火工艺种类很多,一类是在临界温度(Ac1或Ac3)以上的退火,又称为相变重结晶退火,包括()()()和()等;
A.
完全退火
B.
不完全退火
C.
球化退火
D.
扩散退火（均匀化退火）
【简答题】n. the state or fact of continuing to live s__________
【单选题】将钢加热到A3以上或A1左右一定温度，保温后缓慢(一般随炉冷却)而均匀冷却的热处理方法称为退火，它可以( )。
A.
提高钢的硬度、提高塑性
B.
降低钢的硬度、提高塑性
C.
提高钢的硬度、降低塑性
D.
降低钢的硬度、降低塑性
【简答题】“You are very selfish. It’s high time you ________ that you are not the most important person in the world,” Edgar said to his boss angrily. A) realized B) have realized C) realized D) should realize
【判断题】You do the “Chop” gesture when you are very persuasive and when you convey an important fact that you are very sure of.
A.
正确
B.
错误
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