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【单选题】
正方体ABCD-A 1 B 1 C 1 D 1 中，M为侧面ABB 1 A 1 所在平面上的一个动点，且M到平面ADD 1 A 1 的距离是M到直线BC距离的2倍，则动点M的轨迹为（ ）A.
椭圆
B.
双曲线
C.
抛物线
D.
圆
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举一反三
【多选题】What information should be included in the body of a notice?
A.
time
B.
place
C.
event
D.
attendees
【单选题】Die alte Dame dankt ________ für die Hilfe.
A.
die Kinder
B.
den Kinder
C.
den Kindern
【简答题】阅读理解。 Mr. Black was a policeman. He was a kind person. He liked to have a walk in the park after breakfast. It was very cold on a winter morning. Mr. Black was walking along the street when he heard a...
【单选题】关于BMCI值，下列表述不正确的是（）。
A.
多环芳烃比单环芳烃的BMCI低；
B.
定义油品的BMCI值时，以苯的BMCI为100；
C.
直链烷烃或分子结构接近直链烷烃的BMCI值接近于0；
D.
BMCI值是依油品最基本的两个性质即馏程和密度建立起来的关联指标
【单选题】关于糖酵解的叙述错误的是:
A.
是体内葡萄糖氧化分解的主要途径
B.
全过程在细胞液中进行
C.
该途径中有ATP生成步骤
D.
是由葡萄糖生成乳酸的过程
E.
只有无氧条件下葡萄糖氧化才有此过程
【多选题】When station officers notice that passengers stay in the subway station for a long time, what should he or she do?
A.
A station officer should promptly ask their reasons, and politely stop passengers’ behavior for the normal operation.
B.
A station officer should explain the company’s regulation to the passengers that it is not allowed for passengers to stay in the station for a long time.
C.
A station officer should ask the passengers to leave the station politely.
D.
A station officer should call the police right away.
【单选题】— What does the notice say? — All the storytellers should meet at the same hall _____ won the first three prizes. [ ]
A.
what
B.
as
C.
who
D.
which
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