同学们摘西红柿。第一小队有7人，第二小队是第一小队的2倍，第二小队有多少人？两队一共有多少人？
7×2=14（人）；7+14=21（人）
Jack descried his father, who ____abrave boy many years ago, as a strong-willed man. [ ]
A. would be
B. would have been
C. must be
D. must have been
夏季热除特有的症状外，在其兼证中，下列哪项不符：（）
A.食欲减退
B.面色苍白
C.身体日渐消瘦
D.肢端欠温
E.精神无明显改变
