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【多选题】
哪些方法可以证明PS本体符合Flory无规线团模型A.
高聚物本体测得的均方旋转半径和溶液中测得的结果相近
B.
结晶聚苯乙烯的均方旋转半径与熔体的均方旋转半径相等
C.
在PS本体和溶液中，分别用高能辐射使高分子发生分子内交联，实验结果并未发现本体体系发生内交联倾向比溶液中更大
D.
X射线衍射图上只出现弥散环
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举一反三
【单选题】Q2. How does the pedlar tell him to go there?
A.
Walk to the corner. Then make a left turn. Make another left to Wooster. Then walk two blocks to the traffic light.
B.
Walk to the corner. Then make a left turn. Then walk two blocks to the traffic light. Make another left to Wooster.
C.
Walk to the corner. Then walk two blocks to the traffic light. Then make a left turn. Make another left to Wooster.
【单选题】听力原文：Could you tell me how I can cancel my reservation tomorrow? (A) Sorry, we're fully booked. (B) May I have your name, please? (C) I can get there by 3 p.m. tomorrow. (38)
A.
B.
【简答题】若要复位单片机,需要在______引脚上加载______个时钟周期的_______电平。
【单选题】— My son, who is now studying at a university, uses more than 3,000 yuan a month. — Well, tell him to be economical. After all, ______.
A.
money doesn’t grow on trees
B.
the morning sun never lasts a day
C.
light come, light go
D.
penny wise, pound foolish
【单选题】Please tell him to go along until he comes to the traffic light.
A.
告诉他一定要遵守交通灯的指挥。
B.
告诉他到交通灯那儿后一直往前走。
C.
告诉他一直走，直至交通灯那儿。
D.
请告诉他沿着交通灯一直走
【单选题】We can also cancel this policy straight away ______ you do not pay the premium．
A.
unless
B.
whether
C.
weather
D.
if
【单选题】微机型变压器的零序方向电流保护其“零序方向指向”控制字为“1”其零序方向元件指向变压器,此时()
A.
零序方向电流保护作为变压器接地的后备，其方向灵敏角为225度；
B.
零序方向电流保护作为变压器接地的后备，其方向灵敏角为75度；
C.
零序方向电流保护作为变压器及该侧母线接地的后备，其方向灵敏角为225度。
【判断题】If you can’t make it to an appointment, call them to cancel as soon as you possibly can.
A.
正确
B.
错误
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