【名词&注释】
美国人(americans)、浓硫酸(concentrated sulfuric acid)、公立学校(public school)、生活水平(living standard)、酒精灯(spirit lamp)、意外事故(contingency)、碳酸氢钠溶液(sodium bicarbonate solution)、钝角三角形(obtuse triangle)、锐角三角形(acute triangle)
[单选题]下列对实验意外事故的处理错误的是
A. 硫酸洒在实验台上，立即用烧碱溶液冲洗
B. 实验药液溅入眼睛，立即用水冲洗，切不可用手揉搓
C. 酒精灯洒出的酒精在桌上燃烧，立即用湿布或沙子扑灭
D. 浓硫酸沾到皮肤上，立即用大量的水冲洗，再涂上3%-5%的碳酸氢钠溶液(sodium bicarbonate solution)
查看答案&解析
举一反三：
[单选题]37．
A. and
B. though
C. or
D. because
[单选题]三角形的一个外角是锐角，则此三角形的形状是（ ）
A. 锐角三角形(acute triangle)
B. 钝角三角形(obtuse triangle)
C. 直角三角形
D. 无法确定
[单选题]Which is the correct way to act in an earthquake?
A. Run downstairs and cover your head and neck with your arms.
B. Drive your car quickly through the overpass and get out of it.
C. When you stay under a strong piece of furniture, you should hold on to it and be prepared to move with it.
D. Climb over the back of the seat and cover your head and neck with your arms.
[单选题]30． The best title for the passage is _________
A. Cutting Price
B. Corner Store
C. Supermarket
D. Shopping
[单选题]13．
A. Several
B. Most
C. A few
D. Few
[单选题]17．
A. Other '
B. Others
C. Another
D. The other
[单选题]在原始地球上，原始生命产生于( )
A. 原始大气中
B. 冷却降雨过程中
C. 原始海洋中
D. 上帝的恩赐
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