While it cannot be scientifically proven （or disproved, for that matter. that global warming caused any particular extreme event, we can say that global warming very likely makes many kinds of extreme weather both more frequent and more severe.
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—Good evening.I ______ to see Mary.
—Oh, good evening.I&39;m sorry, but she is not in.
A. came
B. come
C. have come
D. had come
—I wonder why Mr. Brown hasn &39;t showed up at the meeting yet.
—I &39; m not sure, but he ______ in a traffic jam driving here
A. could be stuck
B. might stuck
C. might have been stuck
D. must have stuck
可作骨折代甲夹板的物品有
A. 绷带
B. 木板,硬纸板
C. 衣物
心肺复苏有效指征：
A. 皮肤粘膜由紫绀变红润
B. 颈动脉由无变有
C. 瞳孔由大变正常
D. 以上都对
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