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【单选题】
听力原文： The United Nations estimates that nearly 35 thousand children around the world die every day from malnutrition and preventable diseases. Coming up in this half hour we'll hear how one US congressman hopes to change those grim statistics. Also ahead saving the whales in the ocean are the priorities of an artist named Wyland. He is now painting giant outdoor murals to celebrate the environment and teach people about nature. How many children die every day from malnutrition and preventable diseases according to the UN estimation?A.
Twenty-five thousand.
B.
Fifty-five thousand.
C.
Forty-five thousand.
D.
Thirty-five thousand.
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举一反三
【简答题】按导游使用的语言划分,导游人员分为( )人员和( )人员。
【单选题】碰撞按变形后的恢复速度可以分为 _______________ 。
A.
完全弹性碰撞、弹性碰撞与塑性碰撞
B.
对心碰撞、偏心碰撞与正碰撞、斜碰撞
C.
光滑碰撞与非光滑碰撞
D.
塑性碰撞
【简答题】按照导游人员使用的语言划分，导游人员可分为中文导游人员和____导游人员。
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