严重的通货膨胀是由快速的货币增加所引起的。（）

 读《我国对外贸易进出口额增长图》(图7－7－8)和《我国出口商品构成变化图》(图7－7－9)，完成下列问题。

(1)我国对外贸易总额1996年比1950年增长了_____倍。

(2)1952年到1996年间我国外贸出口商品的构成发生的变化是____，

其原因是____。

(3)下列产品中属于我国主要的出口商品的是     (    )

A．纺织品、服装

B．石油、煤炭　

C．机电产品、小麦

D．日用工业品、稻米

枸橼酸钠具有抗凝血作用是因为它能（）

A.增强抗凝血酶Ⅲ的作用

B.抑制凝血酶活性

C.增强肝素的作用

D.清除了血浆中的钙

E.使血浆中没有游离的Ca²⁺

每年完成的外贸吞吐量占全国沿海主要港口的（）%左右。

Six years later, in an about-face, the FBI admits that federal agents fired tear gas canisters capable of causing a fire at the Branch Davidian compound near Waco, Texas in 1993. But the official said the firing came several hours before the structure burst into flames, killing 80 people including the Davidians’ leader, David Koresh.

"In looking into this, we’ve come across information that shows some canisters that can be deemed pyrotechnic in nature were fired--hours before the fire started," the official said. "Devices were fired at the bunker, not at the main structure where the Davidians were camped out."

The Federal Bureau of Investigation maintains it did not start what turned to be a series of fiery bursts of flames that ended a 51-day standoff between branch members and the federal government. "This doesn’t change the bottom line that David Koresh started the fire and the government did not," the official said. "It simply Shows that devices that could probably be flammable were used in the early morning hours."

The law enforcement official said the canisters were fired not at the main structure where the Davidian members were camped out but at the nearby underground bunker. They bounced off the bunker’s concrete roof and landed in an open field well, the official said. The canisters were fired at around 6 a.m. , and the fire that destroyed the wooden compound started around noon, the official said. The official also added that other tear gas canisters used by agent that day were not flammable or potentially explosive.

While Coulson denied the grenades played a role in starting the fire, his statement marked the first time that any U.S. government official has publicly contradicted the government’s position that federal agents used nothing on the final day of the siege at Waco that could have sparked the fire that engulfed the compound. The cause of the fiery end is a major focus of an ongoing inquiry by the Texas Rangers into the Waco siege.

Coulson’s speech has（）

A. made the matter even more complicated and confusing

B. been approved by the government

C. met sharp criticism

D. brought the whole matter into broad daylight

青年男性病人，腰痛、僵硬，逐渐出现驼背，X线片见骶髂关节模糊，间隙消失，可能诊断是

A．慢性腰扭伤

B．腰肌劳损

C．腰椎结核

D．腰椎间盘突出症

E．强直性脊柱炎