Why does the author choose to be "a buy-and-hold investor"？
A. Because his employer prohibits him to trade equities on a short-term basis.
Because he believes that long-term return will balance out short-term fluctuation.
C. Because he is misguided by the loyalty to the idea of "buy and hold."
D. Because he is an active investor and keeps an eye on stock markets every day.
查看答案
In the passage, Mother Nature showed her power in all of the following ways EXCEPT
A. evacuating people to higher ground.
B. sweeping different kinds of animals away.
C. carrying cars and trucks miles away.
D. immersing buildings in the low-lying areas in water.
When did Erik Weihenmeyer scale North America's highest peak？
A. 1995.
B. 1997
C. 1998
D. 1999
查询销售金额合计超过20000的商店，查询结果包括商店名和销售金额合计。正确命令是
A. SELECT商店名，SUM(销售数量*单价)AS销售金额合计 FROM商店，商品，销售． WHERE销售金额合计20000
B. SELECT商店名，SUM(销售数量*单价)AS销售金额合计＞20000 FROM商店，商品，销售 WHERE商品．商品号=销售．商品号AND商店．商店号=销售．商店号
C. SELECT商店名，SUM(销售数量*单价)AS销售金额合计 FROM商店，商品，销售 WHERE商品．商品号=销售．商品号AND商店．商店号=销售．商店号 AND SUM(销售数量*单价)＞20000 GROUP BY商店名
D. SEKECT商店名，SUM(销售数量*单价)AS销售金额合计 FROM商店，商品，销售 WHERE商品．商品号=销售．商品号AND商店．商店号=销售．商店号 GROUP BY商店名HAVING SIJM(销售数量*单价)＞20000
Why did the team of 10 Americans had a goal of making history？
A. Because it is the first team that topped Mt. Everest.
Because all of the members of the team are blind men except Erik Weihenmeyer.
C. Because one of its members is Erik Weihenmeyer, who hopes to become the first blind man to clear the famed Mt. Everest.
D. Because all of the members of the team are old men who are eager to climb the famed peak.
微信支付 
支付宝支付