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【多选题】
生产上降低原料溶剂成本的方法主要有A.
采用化工原料
B.
化学纯溶剂
C.
工业纯溶剂
D.
溶剂回收套用
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举一反三
【单选题】The mother cried because _______.
A.
her son understood nothing for her life
B.
she was afraid she couldn't keep her new job
C.
she had been fired
D.
the family burden proved too much for her
【单选题】The young mother walked off, leaving the little boy _____ in the room. [ ]
A.
cry
B.
crying
C.
cried
D.
to cry
【单选题】It's very foolish _____ it?
A.
for you to say
B.
of you to say
C.
with you saying
D.
in your saying
【多选题】下列那些不属肉桂的性能特点
A.
辛苦性温，主归肾经
B.
长于温补命门之火而益阳消阴
C.
引火归元，治虚阳上浮
D.
兼人肺经，温肺散寒
E.
兼人心脾血分，温经通脉
【单选题】Knowing that her son was suffering from a ___ disease, the mother cried her eyes out.
A.
deadly
B.
dying
C.
dead-like
D.
deathly
【单选题】如图所示,一个半径为 R 的导电圆环与一个轴向对称的发散磁场处处正交,环上各点的磁感应强度 B 大小相等、方向均与环面轴线方向成 θ 角 ( 环面轴线为竖直方向 ) 。若导电圆环上载有如图所示的恒定电流 I ,则下列说法中正确的是 ( ) 。
A.
导电圆环所受安培力方向竖直向下
B.
导电圆环所受安培力方向水平向右
C.
导电圆环所受安培力的大小为 2 BIR
D.
导电圆环所受安培力的大小为 2π BIR sin θ
【单选题】The mother cried because ________________ .
A.
her son understood nothing of her life
B.
she was afraid she couldn’t keep her new job
C.
she had been fired
D.
the family burden proved too much for her
【单选题】It's very foolish _____ it?
A.
for you to say
B.
with you saying
C.
of you to say
D.
in your saying
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