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  3. 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 yar

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 yar

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问题      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 【C1】______  fires 【C2】______   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 【C3】______  off with great 【C4】______  by the Pentagon to members of Congress who will be asked to 【C5】______  the money. The makers, Alliant Tech systems, say that the weapon will revolutionize 【C6】______  combat much as the machine gun.
     Pentagon jargon has given the new gun a(an) 【C7】______  title: the Objective Individual Combat Weapon. 【C8】______  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 【C9】______  shrapnel behind,   【C10】______   or even from the side of enemy troops who have taken 【C11】______  behind a building. The shell can be 【C12】______  to explode after a short delay. The weapon’s 1,000 yard accuracy is twice 【C13】______  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 gun sight has an infrared lens for night 【C14】______  . 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 【C15】______  without exposing himself to enemy return fire. But there are snags still be 【C16】______  out. Two men were 【C17】______  when a shell burst in a barrel during firing tests. The rifle weighs more than 181 b. There are questions whether its electronic innards will be rugged enough for rain, snow and difficult 【C18】______  
     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 【C19】______  the viewfinder and 【C20】______  the trigger."
【C19】
选项 A、at
B、over
C、into
D、through
答案D
解析 题型：语法题(动介词搭配及意义)。look through the viewfinder的意思是“透过瞄准装置显示”。look at指单纯地“看”。look over指“(医生)检查”。look into指“窥视：调查；过问”。如：look into a question调查一个问题。
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