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【多选题】
肠杆菌科微量生化管试验,如果葡萄糖测试管不产酸,测可能情况是A.
试剂有问题
B.
测试菌可能为非发酵菌
C.
接种未成功
D.
产生气体太多，酸没了
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皮皮学刷刷变学霸
举一反三
【单选题】C语言中,关于 while 和 do while 循环语句的正确叙述是( )
A.
while 语句的循环控制条件为真时结束循环。
B.
do while 语句的循环控制条件为真时结束循环。
C.
while 循环体中不允许是空语句。
D.
do while 的循环体至少被执行一次。
【简答题】阅读理解。 Margaret Cook is a professional, married woman with two young children. The elder, who is four, has just started at a local primary school. It is a school that she was eager for her daughter to ...
【单选题】Rodney Mace, 35, is married with two young children, and is a part-time teacher of architectural history. 'I am constantly surprised by other people’s surprise, when they come to the house and see me ...
A.
they have a truly equal partnership
B.
the husband enjoys staying at home
C.
they earn more money
D.
the wife has a fun-time job
【单选题】在一项经典的实验研究中，研究者选定出生后2个月、5个月和8个月三个年龄段的儿童，把毛巾(刺激变量)分别放在他们的脸上，以考察不同年龄儿童的反应。这种研究方式属于( )。
A.
整体研究
B.
横断研究
C.
纵向研究
D.
个案研究
【单选题】两圆x 2 +y 2 -4x+6y=0和x 2 +y 2 -6x=0的圆心连线方程为 ( )
A.
x+y+3=0
B.
2x-y-5=0
C.
3x-y-9=0
D.
4x-3y+7=0
【单选题】Rodney Mace, 35, is married with two young children, and is a part-time teacher of architectural history. 'I am constantly surprised by other people's surprise, when they come to the house and see me ...
A.
they have a truly equal partnership
B.
the husband has more sense of household responsibility
C.
the couple cares little about other people's comment on their life
D.
the wife has a full time job
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