题目内容

Hepatitis B and C are even more easily ___ in blood and needles that HIV.

A. to pass
B. passed
C. pass

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This infection happens through sexual contact and by ___ needles that have been polluted with infected blood.

A. sharing
B. owning
C. using

Even when infected people don't have any___, they can still pass the disease on to others.

A. system
B. symptoms
C. condition

下列关于字符串的说法，错误的是：

A. 可以用单引号，也可以用双引号创建字符串
B. 只有在三引号字符串中可以包含换行回车等特殊字符
C. 转义字符\n表示换行
D. 字符可视为长度为1的字符串

a="hello",b=5,则print(a+b)的结果为：

A. hello
B. 5
C. hello5
D. 报错