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绿色植物在光合作用中制造的          ，超过了自身呼吸作用的需要，其余的           都以气体形式排到了大气中；绿色植物还通过              ，不断地消耗大气中的         这样就维持了生物圈中          和              的         __平衡。

答案

氧气；氧气；呼吸作用；氧气；氧气；二氧化碳；相对平衡

单项选择题

土霉素拌饵投喂使用量为每千克鱼每天（）。

A.50mg

B.100mg

C.150mg

D.200mg
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填空题

Animation means making things which are lifeless come live and62. ______ .
move. Since earliest times, people have always been fascinated by
movement. And not until this century have we managed to capture 63. ______ .
movement, to record it, and in the case of animation, to reinterpret it 64. ______ .
and recreate it. To do all this, we use a movie camera and a projector. In
the world of cartoon animation, everything is impossible. You can65. ______ .
make the characters you create do exactly that you want them to do. 66. ______ .
A famous early cartoon character was Felix the Cat, created Pat 67. ______ .
Sullivan in America in the early nineteen twenties. Felix was a
marvelous cat. He could do all sorts of things no natural cat can do as 68. ______ .
taking off his tail, using it as a handle and then putting it back. The
famous Walt Disney cartoon characteristics came to life after 1928. 69. ______ .
Popeye the Sailorman and his girl friend Olive Oyl were born at the
Max Fleischer studios in 1933. But to be an animator, you don’t have
to be a professional. It is possible for anyone to make a simple
animated film with using a camera at all. All that you have to do is to 70. ______ .
draw directly on to blank film and then running the film through a 71. ______ .
projector.
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