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【单选题】
甲醛、乙醛和丙醛组成的混合物中，氢元素的质量分数是9％，则氧元素的质量分数是A.
16%
B.
37%
C.
48%
D.
无法计算
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【简答题】What caused this decision? political and ______ .
【单选题】下列关于内耳的叙述中，正确的是（ ）
A.
前庭阶和鼓阶内的淋巴互不相通
B.
三个骨半规管通过5个孔开口于前庭后部
C.
前外侧半规管的壶腹脚合成一个总骨脚
D.
壶腹嵴位于骨半规管单骨脚内
E.
蜗管可在蜗顶处借蜗孔与前庭阶相通
【单选题】青少年膳食总原则为充足的能量，足量的动物性食品、果蔬、谷类及( )
A.
平衡膳食，多运动
B.
防止肥胖
C.
适当节食
D.
不宜控制高能量食品
E.
控制高能量食品
【单选题】It is not expected ____ he said caused so much discussion at the meeting.
A.
that
B.
what that
C.
what
D.
that what
【简答题】What caused a change in the author’s understanding of keeping a diary? A.A dull night on the journey. B.The beauty of the great valley. C.A striking quotation from a book. D.Her concerns for future ge...
【单选题】According to the writer, what is the worst thing caused by high young child mortality?
A.
The suffering children are subjected to.
B.
Inaccurate and unreliable data on child mortality.
C.
The large-scale waste of human potential.
D.
The lack of labor force for economic development.
【单选题】What caused the change in the legal system after the 5th century CE?
A.
Change in the religion which abolished judicial proceedings
B.
No need for complicated rules on the commercial law or property transfers
C.
Barbarian immigration which abolished old legal sources
D.
Change in the social organization, which abolished individual ownership of land
【简答题】What caused the giant tsunami?
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