皮皮学，免费搜题
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【判断题】
已知x为非空列表，那么执行语句x[0]=3之后，列表对象x的内存地址不变。A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】— David, why are you so excited? —My father has made a _________ that he will take me to Tibet next month.
A.
face
B.
contribution
C.
promise
D.
mistake
【单选题】— David, why are you so excited? — My father has made a _______that he will take me to Tibet next month.
A.
promise
B.
problem
C.
mistake
【单选题】互补验证载体构建是采用的策略,下列说法最合适的是()
A.
35S启动子+野生型基因组DNA+下游终止序列
B.
野生型中该基因的启动子+基因组DNA+下游终止序列
C.
野生型中该基因的启动子+CDS序列
D.
野生型中该基因的启动子+ORF序列
【单选题】--- David. Why are you still here? They are ready to start. --- Sorry, but I when to leave.
A.
don’t tell
B.
didn’t tell
C.
am not told
D.
wasn’t told
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