我国南方包括台湾省在内山区传播疟疾的主要媒介是（）。
A．中华按蚊
B．微小按蚊
C．大劣按蚊
D．伊蚊
E．雷氏按蚊嗜人血亚种
参考答案：B
甲、乙两个码头相距308.7千米，一艘轮船从甲码头开往乙码头，3小时行了73.5千米．照这样的速度，几小时可以到达乙码头？
用所给词的正确时态填空。
1. I would like (eat) different vegetables every day.
2. The girls (visit) their teacher last Sunday.
3. Don't make any noise! (别吵) My grandfather (sleep) at home.
4. My parents (be) busy yesterday.
5. Some boys (go) swimming on May 1st, 2010.
