Passengers must exit airplanes swiftly after accidents, since gases released following accidents are toxic to humans and often explode soon after being released. In order to prevent passenger deaths from gas inhalation, safety officials recommend that passengers be provided with smoke hoods that prevent inhalation of the gases. Which of the following, if true, constitutes the strongest reason not to require implementation of the safety officials recommendation？
A. Test evacuations showed that putting on the smoke hoods ridded considerably to the overall time it took passengers to leave the cabin.
B. Some airlines are unwilling to buy the smoke hoods because they consider them to be prohibitively expensive.
C. Although the smoke hoods protect passengers from the toxic gases, they can do nothing to prevent the gases from igniting.
D. Some experienced flyers fail to pay attention to the safety instructions given on every commercial flight before takeoff.
E. In many airplane accidents, passengers who were able to reach emergency exits were overcome by toxic gases before they could exit the airplane.
In Swartkans territory, archaeologists discovered charred hone fragments dating hack 1 million years. Analysis of the fragments, which came from a variety of animals, showed that they had been heated to temperatures no higher than those produced in experimental campfires made from branches of white stinkwood, the most common tree around Swartkans. Which of the following, if true, would, together with the information above, provide the best basis for the claim that the charred bone fragments are evidence of the use of fire by early hominids？
A. The white stinkwood tree is used for building material by the present-day inhabitants of Swartkans.
B. Forest fires can heat wood to a range of temperatures that occur in campfires.
C. The bone fragments were fitted together by the archaeologists to form. the complete skeletons of several animals.
D. Apart from the Swartkans discovery, there is reliable evidence that early hominids used fire as many as 500 thousand years ago.
E. The bone fragments were found in several distinct layers of limestone that contained primitive cutting tools known to have been used by early hominids.
孔老夫子说君子有三戒，少时戒斗，状时戒色，老时戒得。()
MSSQLServer的()存储过程用于得到一个指定目录或驱动器下的子目录信息。
A. formatmessage
B. Srv_paraminfo
C. Xp_sprintf
D. xp_dirtree
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