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【单选题】
有丝分裂器是指A.
由微管、微丝、中等纤维构成的临时细胞器
B.
由基粒、纺锤体、中心粒构成的临时细胞器
C.
由微管、中心粒和染色体组成的临时细胞器
D.
由微丝、中心粒和染色体组成的临时细胞器
E.
由纺锤体、中心粒、微丝组成的临时细胞器
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举一反三
【简答题】A ______ language is one that still has native speakers but is not being learned by children.
【单选题】Which of the following is NOT the viewpoint of the critics on homeschooling?
A.
Those children who don't go to school are lacking important social skills.
B.
The ability of parents to teach their kids is doubtful.
C.
The home-educated children are able to enter those famous universities.
D.
The home-educated children have little interaction with their peers.
【简答题】永磁同步电机的转子始终跟着旋转磁场以 速度旋转。
【单选题】已知基因ABC及其等位基因分别位于不同染色体上，现有一对夫妇，妻子的基因型为AaBBCc，丈夫的基因型为aaBbCc，其子女中的基因型为aaBBCC的比例和出现具有aaB_C_表现型女儿的比例分别为（ ）
A.
1/8 3/8
B.
1/16 3/8
C.
1/16 3/16
D.
1/8 3/16
【单选题】By mentioning the 1964 report on smoking, Jeffrey Koplan implied that ______.
A.
more children tend to smoke today than yesterday
B.
both obesity and smoking require the attention of schools and society
C.
the present plan on obesity would function similarly as a landmark
D.
obesity and smoking are both health problems
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