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【简答题】
Hi Grace, How’s it going? Sorry I haven’t emailed for a while, but I had so much to do! I had told you about my decision to take up a sport. I knew I wasn’t fit and I wanted to get some exercises. But that wasn’t the only reason that I decided to do a sport. Students who play sports do better at school. 小题1: Exercise also helps learning and memory . 小题2: First, I tried soccer. I had played a bit of soccer before and I thought it would be too bad. I knew I couldn’t run very long without feeling tired. On the first day, I was able to run for the first ten minutes, but then I was so tired that I couldn’t even kick the ball! Then, I tried volleyball. 小题3: I was able to run for the first twenty minutes and I wasn’t the slowest runner in the team! After a few weeks, I could run faster and longer. I was doing better and feeling better. 小题4: Maybe I’m not a team sport person after all. Finally, I tried kung fu . It’s a great sport that exercise the body and the mind. You learn to follow instructions carefully and do what you are asked to do. This is the right sport for me ! 小题5: I feel so confident that I even showed some moves to the class last week. Can you believe it? I hope you are OK! Write and let me know what you’ve been doing! Bye for now! Kristie
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【单选题】既是流水地貌又是风化地貌的地貌类型是( )。
A.
喀斯特地貌
B.
泥石流
C.
雅丹地貌
D.
河漫滩
【简答题】两根不同材料的等截面直杆,承受相同的轴向拉力,它们的横截面和长度都相等,试说明:(1)横截面上的应力是否相等?(2)强度是否相同?(3)绝对变形是否相同?
【单选题】两根不同材料的等截面直杆,承受相同的轴向拉力作用,它们的横截面面积和长度都相等。则两杆横截面上的应力 ;两杆的变形 。
A.
相同;相同
B.
相同;不同
C.
不同;不同
D.
不同;相同
【判断题】浇注系统是承接并引导液态金属流入型腔的一系列通道,通常由 直浇道、横浇涎、内浇道、昌口等组成
A.
正确
B.
错误
【简答题】浇注系统通常由()、()、()、()等部分组成。
【单选题】两根不同材料的等截面直杆,承受相同的拉力,它们的截面积与长度都相等 ,则下列说法正确的是: ( )。
A.
内力图不同;
B.
应力不同;
C.
变形量不同;
D.
强度相同。
【单选题】Tā de shūbāo bèi tōuzǒu le ma?他 的 书包 被 偷走 了 吗?
A.
B è i m é i t ō uz ǒ u 被 没 偷走
B.
M é i b è i t ō uz ǒ u 没 被 偷走
C.
B è i t ō uz ǒ u m é i 被 偷走 没
D.
【单选题】书包shūbāo
A.
school bag
B.
textbook
C.
next month
D.
homework
【单选题】Tā de shūbāo bèi tōuzǒu le ma?他 的 书包 被 偷走 了 吗?
A.
B èi méi tōuzǒu 被 没 偷走
B.
M éi bèi tōuzǒu 没 被 偷走
C.
B èi tōuzǒu méi 被 偷走 没
D.
X
【判断题】Shūbāo ràng tā ná le。( )书包 让 他 拿 了。
A.
正确
B.
错误
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