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 trouble confronting Air France

A．Deferred taxes being due.

B．The shrinking French market.

C．A four-day strike by pilots in September.

D．The war on Iraq.

以下说法正确的是（）

A.用γ值大的胶片比用γ值小的胶片获得的对比度高

B.X线量对X线照片对比度有直接影响

C.灰雾对X线照片对比度没有影响

D.管电压高低对X线照片的对比度没有影响

E.观片灯的亮度对照片的光学对比度有影响