在人工填土地基的换填垫层法中，下面（）不宜于用作填土材料。
A．级配砂石
B．矿渣
c．膨胀性土
D.灰土
参考答案：C
There ___ two football matches on TV tonight.
A．are going to have
B．are going to be
C．is going to be
D．are going to has
完成将累加器AL清零，并使进位标志CF清零，下面错误的指令是（）
A.MOV AL，00H
B.AND AL，00H
C.XOR AL，AL
D.SUB AL，AL
