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【单选题】
已知，某烷烃的临界温度为30℃，在在0℃时的气化潜热约为400kJ/kg，在10℃时的气化潜热约为300kJ/kg，则当温度为30℃时，该烷烃的气化潜热值是（）kJ/kg。A.
400
B.
200
C.
100
D.
0
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【单选题】Generally speaking, the____specifies whether a certain tagmeme is in the position of Nucleus or of the Margin in the structure.
A.
slot
B.
class
C.
role
D.
cohesion
【单选题】He found himself ________ by the note in the margin of the book.
A.
absorbed
B.
absorbing
C.
absorb
D.
abandon
【单选题】The practice of adjusting the margin balance in a futures account for the daily change in the futures price is called:
A.
settling up.
B.
marking to market.
C.
a margin call.
【单选题】The table below is to record section IV NTS amendments ( ) this volume. Sub-paragraph members in the margin of the body of the book are to assist the user asking amendment to this volume.
A.
affecting
B.
correcting
C.
influencing
D.
effecting
【判断题】The gain margin of a system is the increase in the system gain when the phase is【图片】 that will result in a marginally stable system.
A.
正确
B.
错误
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