电视中说：在科技节的14天期间，我市参观各种科技展览的人数达252万人，平均每天

Air France SA said Monday that its second-quarter net profit fell 35 percent to €57 million ($57.4 million), but sales were steady and operating profit surged.Earnings before interest and tax, a measure of operating income, gained 86 percent to €141 million as fuel costs fell and cargo traffic rose. Air France has been hurt less than rivals such as British Airways PLC and Lufthansa AG by the slowdown on North Atlantic routes following the war on Iraq in 2003 because it has fewer flights in that market.Net income fell as the airline paid deferred taxes that came due. Sales rose 0.9 percent to €3.2 billion. The carrier lost about €80 million in revenue because of a four-day strike by pilots in September. An accord was reached tying future pay increases to inflation. The carrier said that first-half fuel costs fell 15 percent to €680 million. Cargo traffic rose 11 percent in the second quarter, while passenger traffic rose 1.1 percent. The airline’’s shares gained 87 cents, or 7.7 percent, to close at €12.11.Separately, Air France and Alitalia SpA agreed to buy 2 percent stakes in each other as Europe’’s second- and sixth-largest airlines deepen their partnership.

Which of the following is not a cause for Air France’s earnings to rise before interest and tax

A．The drop in fuel cost.

B．The rise in cargo traffic.

C．The rise in passenger traffic.

D．Its partnership with Alitalia SpA.

从山下到山顶的盘山公路长3千米，小明上山每小时行2千米，下山每小时行3千米，他上、下山的平均速度是每小时[ ]

A．2.5千米

B．1.2千米

C．2.4千米

I don’t think David could have done such a stupid thing last night,         ?

A．did he

B．didn’t he

C．do I

D．don’t I

诊断原发性甲状腺功能减退症最敏感的指标是（）

A.T₃

B.T₄

C.FT₃

D.TSH

E.甲状腺摄¹³¹I率

热水锅炉上的压力式温度计，其量程应为正常工作温度的（）。

A.1—1.5倍

B.1.5—2倍

C.2—2.5倍

D.2.5—3倍