物体在介质中的沉降，是由于本身的（）而产生的。A、密度 B、质量 C、重力 D、体积

结核菌素试验结果的判断时间应在注射后（）。

A.30分钟

B.1小时

C.12小时

D.24小时

E.72小时

小明拿着一个直径比较大的放大镜，伸直手臂观看远处的物体，可以看到物体的像．下列说法正确的是[ ]

A．观察到的像一定是正立的像

B．观察到的像一定是虚像

C．观察到的像一定是倒立的像

D．观察到的像一定是放大的像

汉译英 。

请用所提供的词汇或句型翻译下列句子。

1. 跟着老师学比我们自己在家学更有趣。(fun) 　

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2. 我们学校的学生都能够自由使用图书馆。(access) 　

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3. 在我们地区遭到暴风雪袭击后，各地人民都赶来援助。(come to) 　　

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4. 每天听英语是值得做的。（worthwhile）　

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5. 这次考试的失败是由于我的准备不足。（lack）

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为确保安全，对现场各类作业人员应告之其作业现场和工作岗位的什么事项？

Valentine’s Day was the time my father chose to show his love for the special people in his life. Over the years I fondly thought (31) him as my "Valentine man".

My first recollection of the magic he could bring to Valentine’s Day came when I was six. That morning at the breakfast table I found a card and a gift-wrapped package at my chair. The card was (32) "Love, Dad" and the gift was a ring with a small piece of red glass to represent my birthstone, a ruby.There is (33) difference between red glass and rubies to a child of six, and I remember wearing that ring with pride that all the cards in the world (34) not surpass.

As I grew older, the gifts gave (35) to heart-shaped boxes filled with my favorite chocolate and always included a (36) card signed "Love,Dad". In those years my thank-you became more of a perfunctory response. The cards seemed less (37) , and I took for granted that the Valentine would always be there. I had (38) my hopes and dreams in receiving cards and gifts from "significant others" and "Love, Dad" just didn’t seem quite enough.His final card remains on my desk today. It’s a (39) of how special fathers ean be and how important it has been to me over the years to know that I had a father who continued a tradition of love with simple acts of understanding and an ability to express happiness over the people in his life.Those things never (40) , nor does the memory of a man who never tried being my Valentine.

35（）。

A. room

B. way

C. honour

D. seat