简述斑铜矿的形态。

默写填空（6分）

（1）《爱莲说》中比喻君子既不与世俗同流合污，又不孤高自许的句子是           

        ，                       ；表达主旨的句子是                        （2）《采莲曲》中运用比喻客观描写采莲少女人花交映，花人同美的句子是：

                       ，                                        

（3）《晓出净慈寺院送林子方》描写红花绿叶，视觉鲜明的句子是：

                        ，                               

（4）五月渔郎相忆否？                       ，                  

（5）半亩方塘一鉴开，                  

（6）望章台路杳，            ，                        。

金具强度的安全系数下列说法哪些是正确的（）？

A.在断线时金具强度的安全系数不应小于1.5

B.在断线时金具强度的安全系数不应小于1.8

C.在断联时金具强度的安全系数不应小于1.5

D.在断联时金具强度的安全系数不应小于1.8

具有竞争性拮抗作用的药物为

A．肾上腺素和普萘洛尔
B．新斯的明与阿托品
C．多巴胺与苄丝肼
D．青霉素与克拉维酸
E．维生素B₆与异烟肼

逻辑运算中位与位之间有时会产生进位和借位。

When Dave was eighteen, he bought a secondhand car for 200 so that he could travel to and from work more (1) than by bus. It worked quite well for a few years, but then it got so old, and it was costing him (2) much in repairs that he decided that he had better (3) it.

He asked among his friends to see if anyone was particularly (4) to buy a cheap car, but they all knew that it was falling to pieces, so (5) of them had any desire to buy it. Dave’s friend Sam saw that he was (6) when they met one evening, and said, "What’s (7) , Dave"

Dave told him, and Sam answered, "Well, what about advertising it in the paper You may (8) more for it that way than the cost of the advertisement!" Thinking that Sam’s (9) was sensible, he put an advertisement in an evening paper, which read "For sale: small car, (10) very little petrol, only two owners. Bargain at 50. " For two days after the advertisement first appeared, there was no (11) . But then on Saturday evening he had an enquiry. A man rang up and said he would like to (12) him about the car. "All right, " Dave said, feeling happy. He asked the man whether ten o’clock the next morning would be (13) or not. "Fine, " the man said, "and I’ll (14) my wife. We intend to go for a ride in it to (15) it. "

The next morning, at a quarter to ten, Dave parked the car in the square outside his front door, (16) to wait there for the people who had (17) his advertisement. Even Dave had to (18) that the car really looked like a wreck. Then, soon after he had got the car as clean (19) it could be, a police car stopped just behind him and a policeman got out. He looked at Dave’s car and then said, "Have you reported this (20) to us yet, sir\

12().

A.tell 

B.see 

C.agree 

D.call