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【单选题】
选出下列结构的正确名称
A.
2-丙酸
B.
3-甲基丁酸
C.
2-甲基丁酸
D.
3-甲基丙酸
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【单选题】What is NOT Kirk’s suggestion for people who are already unhealthy to lose weight?
A.
Healthy eating is a good place to start
B.
Daily exercise can contribute a lot.
C.
A good mood is good medicine.
【多选题】关于抗毒素的说法,正确的是
A.
抗毒素是抗体
B.
抗毒素常用作免疫预防
C.
抗毒素能使机体产生免疫保护力
D.
常用作紧急预防和治疗
E.
类毒素刺激机体不能产生抗毒素
F.
由外毒素/类毒素刺激机体产生
【判断题】行列式的某两个不同列的对应元素成比例,则该行列式的值不为零. ( )
A.
正确
B.
错误
【单选题】What does Jennifer find unbelievable at the end of her conversation with Kirk?
A.
Her weight will go up again.
B.
Eating chocolate once in a while won't be that bad.
C.
Kirk used to weigh twice as much as he does right now.
【简答题】Herbert Kirk
【单选题】What does Jennifer find unbelievable at the end of her conversation with Kirk?
A.
Her weight will go up again.
B.
Kirk used to weigh twice as much as he does right now.
C.
Eating chocolate once in a while won’t be that bad.
【判断题】每行元素之和为零的行列式值为零 .
A.
正确
B.
错误
【单选题】What is Jaidee's suggestion for Kirk?
A.
He can start by learning Chinese customs.
B.
He can start by making Chinese friends.
C.
He can learn more about the meaning of each Chinese holiday.
【单选题】设行列式 , ,若 ,则 的取值为
A.
2 ,-1;
B.
1 ,-1
C.
0 ,2;
D.
0 ,1.
【简答题】What is Jaidee's suggestion for Kirk?
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