铵梯炸药8号雷管不能引爆。

Summer is coming. Grade 9 students are going to goodbye to each other. Everyone must have _______to say to their classmates at this moment. But where can they pull all their warm ______?

In the past, each student would buy a big beautiful notebook and ask their classmates _____ in it. But things are a bit______ now.

Grade 9 students use USB flash disk (软盘) ______notebooks. Some students are not good at Chinese. They can’t use sweet words to show  ______they love their friends. But with the USB flash disk they can write, draw or even make cartoons for each other.

One of the students said, “I like USB flash disk because it ______ less than fifty yuan. And there is a lot of _______ for me to write in.”But some students still like notebooks better. They say words in computers are cold. It is bad for their eyes to use computers_______. “Though a notebook may have less space, I still choose one. A notebook can keep my classmates’ handwriting which makes me______ of them.” said a boy.

Which way will you choose to say goodbye to your classmates?

如图所示，一根张紧的水平弹性绳上的a、b两点相距14.0 m，b点在a点的右方，当一列简谐波沿此绳向右传播时，若a点位移达到正向极大，b点的位移恰为零且向下运动，经过1.00 s后，a点的位移为零且向下运动，而b点的位移恰好达到负向极大，则这列简谐波的波速可能等于

A．14.0 m/s  

B．10.0 m/s

C．6.00 m/s  

D．4.67 m/s

有些消化道肿瘤患者不能口服药物，可选用哪些镇痛方法()

A．直肠给药

B．静脉PCA

C．硬膜外PCA

D．神经阻滞

E．针灸

早期大肠癌病理组织学表述正确的是（）

A.肿瘤已侵及黏膜固有层

B.肿瘤已侵及浆膜层

C.肿瘤已侵及固有肌层伴淋巴结转移

D.肿瘤局限于黏膜下层

E.肿瘤局限于黏膜层，无淋巴结转移

下图表示遗传病家系图。请根据具体病例分析回答：

设Ⅱ-5患抗维生素D佝偻病，Ⅱ-4正常，则他们的儿子中的发病率是（）。若Ⅱ-4患抗维生素D佝偻病，Ⅱ-5正常，则他们的女儿发病率（）（填“相同”或“不同”）。