在开发利用金属矿物和海水资源过程中,下列说法不正确的是
| A.工业上可用电解法冶炼得到金属铝 |
| B.海水蒸发制海盐的过程中只发生了化学变化 |
| C.海水淡化的方法主要有蒸馏法、离子交换法等 |
| D.海水中含有钾元素,需经过氧化还原反应才可得到钾单质 |
Charles was alone at home, with_______ looking after him.
| A.someone | B.anyone | C.not one | D.no one |
It is often ______ that human beings are naturally equipped to speak.
| A.said | B.to say | C.saying | D.being said |
I can’t leave. She told me that I ______ stay here until she comes back.
| A.can | B.must | C.will | D.may |
—— Do you mind my opening the window? It’s a bit hot in here.
—— ______ , as a matter of fact
| A.Go ahead | B.Yes, my pleasure![]() |
C.Yes, I do | D.Come on |
It’s high time you had your hair cut ; it’s getting _______ . 
| A.too much long | B.much too long ![]() |
C.long too much | D.too long much |