材料质量是工程质量的基础,为保证混凝土冬期施工的质量,当采取蓄热法施工时,应选择( )硅酸盐水泥为宜。
A.普通
B.矿渣
C.特种
D.火山灰质
参考答案:A
阅读短文,判断正误,用“√”或“×”表示。
I go to school from Monday to Friday. We have four lessons in the morning and two in the afternoon. After
school, I have many activities. I play ping-pong on Monday. I play basketball on Tuesday. I play the violin on
Thursday. I do my homework in the evening. I read books and watch TV on Saturdays. I play computer games
on Sundays. I love weekends.
( ) 1. I go to school five days a week.
( ) 2. We have four classes every day (每天).
( ) 3. I play the violin on Tuesday.
( ) 4. I read books, watch TV, and play computer games on weekends.
( ) 5. I like Saturday and Sunday.
在函数的返回值类型与返回值表达式类型的描述中,错误的是( )。
A.函数返回值的类型是在定义函数时确定的,在函数调用时是不能改变的B.函数返回值的类型就是返回值表达式的类型C.函数返回值的类型与返回值类型不同时,函数表达式类型应转换成返回值类型D.函数返回值的类型决定了返回值表达式的类型