问题
单项选择题
作业时，履带式起重机起重臂的最大仰角不得超过出厂规定。当无资料可查时，不得超过( )。
A．65°
B．70°
C．74°
D．78°
答案
参考答案：D
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作业时，履带式起重机起重臂的最大仰角不得超过出厂规定。当无资料可查时，不得超过( )。
A．65°
B．70°
C．74°
D．78°
参考答案：D
When I was a sixth grader, kids were separating into groups, but I wasn't sure where I belonged． Our teacher gave us a task called "secret friends" for the coming week．We were supposed to do nice things 1 our friends without letting them know who was doing it．We could leave 2 notes or cards either on their desks or in their backpacks．Before doing the task, with our eyes closed, from a basket, we 3 a name of a classmate who we were to secretly befriend over the next five days． Soon, the task was turned into a competition of giving 4 instead of notes．Everyone was getting cool presents except me．My friend followed the teacher's 5 without a fault．I received nothing but handmade cards with nice words about me． On the last morning, I finally got a package．When I 6 it, the girls around all 7 ．It was perfumed powder, an "old lady" gift．My face went red． I tried to forget about the 8 gift, but when the same girls 9 it again during the break in the bathroom, I joined in, "How stupid! My grandmother wouldn't 10 want it．" The girls laughed at my 11 and filed out of the bathroom．Washing my hands, I let the water run through my fingers 12 I thought about my words．It wasn't 13 like me to say things like that． "I'm your secret friend．" It was Rochelle．" I' m sorry about the gift," she whispered to me, tears 14 down her face． From a poor family, she was a 15 at school for those with rich parents．Yet she just took all the 16 and the horrible treatment silently． I was sick to my stomach as my 17 words ran through my mind．She had heard everything．How could I have been so cruel? Later I learned she had felt bad all week about not being able to leave me any cool present and her mum had given up her only luxury（奢侈品） And I had 18 everything for her． I told her that I had only said those things to try to 19 . "We aren't that different from each other, are we?" She smiled 20 ．Her simple words, spoken from her heart, found their way straight into mine．
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