皮皮学，免费搜题
登录
搜题
【单选题】
Passage 4 Questions 16 to 20 are based on the following passage: Sports and games make our bodies strong, prevent us from getting too fat, and keep us healthy. But these are not their only use.They give us valuable practice in making eyes, brain and muscles work together. In tennis, our eyes see the ball coming, judge its speed and direction and pass this information on to the brain. The brain then arms, legs, and so on, so that the ball is met and hit back where it ought to go. All this must happen with very great speed, and only those who have had a lot of practice at tennis can carry out this complicated chain of events successfully. For those who work with their brains most of the day, the practice of such skills is espcially useful. Sports and games are also very useful for character-training. In their lessons at school, boys and girls may learn about such virtues as unselfishness, courage, discipline and love of one's country but what is learned in books cannot have the same deep effect on a child's character as what is learned by experience. The ordinary day-school cannot give much practical training in living, because most of the pupils' time is spent in classes, studying lessons. So it is what the pupils do in their spare time that really prepares them to take their place in society as citizens when they grow up. If each of them learns to work for his team end not for himself On the football field, he will later find it natural to work for the good of his country instead of only for his own benefit. 16. When we play tennis we have to _____.A.
use, first, our eyes, then the brain and finally the muscles
B.
make our eyes, brain and muscles work almost at the same time
C.
use mainly the arms and legs to hit
D.
usc mainly the muscles so that the ball is met and hit back
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【简答题】请以“我们为什么上大学”为题，写一篇议论文。（字数100－120） 提示：1.不同的人对此有不同的看法。 2.有些学生以为大学是最理想的地方，上大学就是为了获取好的工作和高额工资，但结果是大学的生活和毕业后的工作往往使他们失望。 3.事实上，大学给那些渴望学到更多的知识以便将来报效祖国的人提供了良好的学习机会和必要的条件，这才是大学真正的吸引所在。
【单选题】module xdff(clk,d,q); input clk,d; output reg q; reg t1,t2; always @(posedge clk) begin q <= t2; t1 <=a; t2 <=t1; end endmodule 有几个dff?
A.
0
B.
1
C.
2
D.
3
【简答题】reg a,t1,t2,q; always @(posedge clk) begin q<=t1; t2<=a; t1<=t2; end 上述代码描述了几个寄存器
【简答题】请以“我为什么上大学”为题,写一篇800字左右的演讲稿。
【单选题】module xdff ( clk , d , q ); input clk , d ; output reg q ; reg t1 , t2 , a ; always @( posedge clk ) begin q <= t2 ; a <=d ; t1 <=a ; t2 <=t1 ; end endmodule 该代码描述了几个寄存器?
A.
3
B.
4
C.
2
D.
1
【单选题】若用测线仪测试直通双绞线，则测线仪的灯应当如何闪烁？
A.
1122334455667788
B.
1326314455627788
C.
1221364455637788
D.
1331266244557788
相关题目：