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【单选题】
以下关于构造函数和析构函数的描述中，错误的是____A.
若用户没有定义缺省构造函数，则系统自动生成一个缺省构造函数
B.
若用户没有定义拷贝构造函数，则系统自动生成一个拷贝构造函数
C.
若用户没有定义析构函数，则系统自动生成一个析构函数
D.
以上 A 错误，而 B 、 C 正确
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举一反三
【简答题】John s______ an arm from bed to pick up his phone. Sleepily he asked, “Who is it?”
【简答题】人工合成培养基只能维持细胞生存，但还需补充一定量的天然培养基（ ）。
【简答题】John ______ out an arm from bed to pick up his phone. Sleepily he asked, “Who is it?”
【单选题】John ________ an arm from bed to pick up his phone. Sleepily he asked, “Who is it?”
A.
was flooded with
B.
popped up
C.
stretched out
D.
turned in
【单选题】John ______ out an arm from bed to pick up his phone. Sleepily he asked, “Who is it?”
A.
extended
B.
stretched
C.
flooded
【单选题】John ___ an arm from bed to pick up his phone. Sleepily he asked, “Who is it?”
A.
stretched out
B.
was flooded with
C.
made up for
D.
was destined
【简答题】人工合成培养基只能维持细胞生存，但还需补充一定量的天然培养基（ ）。
【单选题】John _____an arm from bed to pick up his phone. Sleepily he asked, “Who is it?”
A.
spotted
B.
stretched out
C.
found
D.
grabbed
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