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【单选题】
直线的快捷命令是()A.
L
B.
C
C.
A
D.
R
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【简答题】In the fourth paragraph, what does the author mean by saying 'a two-way transaction'?
【单选题】What does euthanasia mean?
A.
A way of killing oneself
B.
A way of ending a patient's life naturally
C.
The painless killing of people who are incurably ill or very old
D.
A murder by the doctor
【单选题】In what way does the unemployment affect the unemployed and their families?
A.
It makes them ill.
B.
It causes the divorce.
C.
It creates a feeling of worthlessness and lack of self-esteem.
D.
All above.
【单选题】非电解质稀溶液的依数性是指( )。
A.
蒸气压上升、沸点升高、凝固点降低和渗透压等
B.
蒸气压下降、沸点升高、凝固点降低和渗透压等
C.
蒸气压下降、沸点下降、凝固点降低和渗透压等
D.
蒸气压下降、沸点升高、凝固点上升和渗透压等
【单选题】下列有关稀溶液依数性的叙述中，不正确的是（ ）。A. 稀溶液依数性是指溶液的蒸气压下降、沸点升高、凝固点下降和渗透压。B. 稀溶液定律只适用于难挥发非电解质的稀溶液。C．稀溶液依数性与溶液中溶质的颗粒数目有关。D. 稀溶液依数性与溶质的本性有关。
A.
稀溶液依数性是指溶液的蒸气压下降、沸点升高、凝固点下降和渗透压。
B.
稀溶液定律只适用于难挥发非电解质的稀溶液。
C.
稀溶液依数性与溶液中溶质的颗粒数目有关。
D.
稀溶液依数性与溶质的本性有关。
【单选题】what does the man want to know? 查看材料
A.
The way to the fifth floor．
B.
The way to Mr．Larry's office．
C.
The way to the conference room．
D.
The way to the lift．
【简答题】What does the man want to know? [A] The way to the fifth floor. [B] The way to Mr. Larry's office. [C] The way to the conference room. [D] The way to the lift.
【简答题】稀溶液的依数性是指溶液的蒸气压下降、沸点升高、( )和滲透压。它们的数值只与溶质的粒子数目 ( 一定量溶剂中溶质的物质的量 ) 成正比。
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