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A．Because nearly 1,000 million acres of land was burned off.B．Because natural resource
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A．He is not satisfied with the company.B．He wants more challenging work.C．He wants to
听力原文：M: What a concert it was! You must have a wonderful night.
W: Yes, we did, it was marvelous. Judging from the amount of applause, I bet everybody appreciated it.
Q: What does the woman mean？
(16)
Some call it the Smart Shooter, a new rifle for American infantry troops that is two weapons in one, is accurate up to 1,000 yards and in 【21】______ fires 【22】______ corners. Its message to enemies is that they can run but they can't hide.
Still in the development phase, the rifle for 2006 has just been 【23】______ off with great 【24】______ by the Pentagon to members of Congress who will be asked to 【25】______ the money. The makers, Alliant Techsystems, say that the weapon will revolutionize 【26】______ combat much as the machine gun.
Pentagon jargon has given the new gun a(an) 【27】______ title: the Objective Individual Combat Weapon. 【28】______ one trigger, the rifle can fire a standard 5.56mm Nato bullet and a 20mm high explosive shell that will burst in the air. It can 【29】______ shrapnel behind, 【30】______ or even from the side of enemy troops who have taken 【31】______ behind a building. The shell can be 【32】______ to explode after a short delay. The weapon's 1,000 yard accuracy is twice 【33】______ of other rifles, made possible by a laser system built into the sight. This rangefinder fixes the target, measures the distance and passes it along to a computer chip in the shell.
The gunsight has an infrared lens for night 【34】______ . It can also have video camera with a zoom lens that is linked to a video display attached to the soldier's helmet, allowing him to aim 【35】______ without exposing himself to enemy return fire. But there are snags still be 【36】______ out. Two men were 【37】______ when a shell burst in a barrel during firing tests. The rifle weighs more than 18lb. There are questions whether its electronic innards will be rugged enough for rain, snow and difficult 【38】______ .
Michael Klare, a professor of peace and world security issues and a board member of the Arms Control Association, says that the Pentagon is seeking this combination of firepower and automation to compensate for the uncertain aim of GIs. He said: "Soldiers won't have to worry about careful steady aim. They'll just look 【39】______ the viewfinder and 【40】______ the trigger."
【21】
The root cause of this tragedy consisted in the prevalent racism in the U.S.
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