单选题 {{I}} Decide which of the choices given below would best complete the passage if inserted in the corresponding blanks. Mark the best choice for each blank on your answer sheet.{{/I}}
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 {{U}} {{U}} 1 {{/U}} {{/U}}fires {{U}} {{U}} 2 {{/U}} {{/U}} 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 {{U}} {{U}} 3 {{/U}} {{/U}}off with great {{U}} {{U}} 4 {{/U}} {{/U}}by the Pentagon to members of Congress who will be asked to {{U}} {{U}} 5 {{/U}} {{/U}}the money. The makers, Alliant Tech systems, say that the weapon will revolutionize {{U}} {{U}} 6 {{/U}} {{/U}}combat much as the machine gun.
Pentagon jargon has given the new gun a(an) {{U}} {{U}} 7 {{/U}} {{/U}}title: the Objective Individual Combat Weapon. {{U}} {{U}} 8 {{/U}} {{/U}}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 {{U}} {{U}} 9 {{/U}} {{/U}}shrapnel behind, {{U}} {{U}} 10 {{/U}} {{/U}} or even from the side of enemy troops who have taken {{U}} {{U}} 11 {{/U}} {{/U}}behind a building. The shell can be {{U}} {{U}} 12 {{/U}} {{/U}}to explode after a short delay. The weapon's 1,000 yard accuracy is twice {{U}} {{U}} 13 {{/U}} {{/U}}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 {{U}} {{U}} 14 {{/U}} {{/U}}. 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 {{U}} {{U}} 15 {{/U}} {{/U}}without exposing himself to enemy return fire. But there are snags still be {{U}} {{U}} 16 {{/U}} {{/U}}out. Two men were {{U}} {{U}} 17 {{/U}} {{/U}}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 {{U}} {{U}} 18 {{/U}} {{/U}}
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 {{U}} {{U}} 19 {{/U}} {{/U}}the viewfinder and {{U}} {{U}} 20 {{/U}} {{/U}}the trigger."