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【单选题】
圆桌面(桌面中间有一个直径为1m的圆洞)正上方的灯泡(看作一个点)发出的光线照射平行于地面的桌面后,在地面上形成如图所示的圆环形阴影.已知桌面直径为2m,桌面离地面1m,若灯泡离地面2m,则地面圆环形阴影的面积是( )
A.
2πm 2
B.
3πm 2
C.
6πm 2
D.
12πm 2
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参考答案:
举一反三
【简答题】下面结构体成员说明中,哪一条语句是错误的 struct Employee { char id[20]; Employee *manager; Employee head; Employee &administrator; }; (2.0分)A. char id[20]; B. Employee *manager; C. Employee head; D. Employee &administrat...
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【单选题】(2019年山东省春季高考,4)--Is that girl in red Lucy? --No, she be Lucy. She has gone to Hainan with her grandparents.
A.
can
B.
must
C.
mustn't
D.
can't
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【单选题】(2019年山东省春季高考,16)--Could you tell me for the coming summer vcation? --I'll join a summer camp in Xi'an.
A.
what did you do
B.
what you did
C.
what will you do
D.
what you will do
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【单选题】坚持从严管党治党。全面()永远在路上 。
A.
实现现代化
B.
从严治党
C.
依法治国
D.
深化改革
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【单选题】给定如下SQL语句:SELECT employee.name, department.dname FROM department,employee WHERE department.did=employee.did;
A.
选项中,与其功能相同的是
B.
SELECT employee.name, department.dname FROM department JOIN employee ON department.did=employee.did;
C.
SELECT employee.name, department.dname FROM department CROSS JOIN employee ON department.did=employee.did;
D.
SELECT employee.name, department.dname FROM department LEFT JOIN employee ON department.did=employee.did;
E.
SELECT employee.name, department.dname FROM department RIGHT JOIN employee ON department.did=employee.did;
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【多选题】要把新时代坚持和发展中国特色社会主义这场伟大社会革命进行好,我们党必须( ),把党建设得更加坚强有力。(),(),是我们党最鲜明的品格,全面从严治党永远在路上
A.
勇于进行自我革命
B.
勇于自我革命
C.
从严管党治党
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【单选题】良性肿瘤的特点是
A.
边界清楚,常常无完整包膜,无明显异型性
B.
分化良好,无明显异型性,浸润性生长
C.
通常无包膜,与正常组织差别大,极性保持良好
D.
:分化良好,无明显异型性,和起源组织相似
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【单选题】Hiring the right employee ________ you ________ a thousand times over in high employee morale.
A.
pays…off
B.
take…off
C.
pays…back
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【单选题】(2019年山东省春季高考,1)--Excuse me, sir. Are you ready to order now? --Yes. I'd like two and two .
A.
hamgurger; cup of juice
B.
hamburgers; cup of juice
C.
hamburger; cups of juice
D.
hamburgers; cups of juice
查看完整题目与答案
【单选题】良性肿瘤的特点是
A.
边界清楚,常无完整包膜,无明显异型性
B.
分化良好,无明显异型性,浸润性生长
C.
和起源组织相似,核仁粗大,增多,可见病理性核分裂相
D.
通常无包膜,与正常组织差别大,极性保持良好
E.
. 分化良好,无明显异型性,和起源组织相似
查看完整题目与答案
相关题目:
【简答题】下面结构体成员说明中,哪一条语句是错误的 struct Employee { char id[20]; Employee *manager; Employee head; Employee &administrator; }; (2.0分)A. char id[20]; B. Employee *manager; C. Employee head; D. Employee &administrat...
查看完整题目与答案
【单选题】(2019年山东省春季高考,4)--Is that girl in red Lucy? --No, she be Lucy. She has gone to Hainan with her grandparents.
A.
can
B.
must
C.
mustn't
D.
can't
查看完整题目与答案
【单选题】(2019年山东省春季高考,16)--Could you tell me for the coming summer vcation? --I'll join a summer camp in Xi'an.
A.
what did you do
B.
what you did
C.
what will you do
D.
what you will do
查看完整题目与答案
【单选题】坚持从严管党治党。全面()永远在路上 。
A.
实现现代化
B.
从严治党
C.
依法治国
D.
深化改革
查看完整题目与答案
【单选题】给定如下SQL语句:SELECT employee.name, department.dname FROM department,employee WHERE department.did=employee.did;
A.
选项中,与其功能相同的是
B.
SELECT employee.name, department.dname FROM department JOIN employee ON department.did=employee.did;
C.
SELECT employee.name, department.dname FROM department CROSS JOIN employee ON department.did=employee.did;
D.
SELECT employee.name, department.dname FROM department LEFT JOIN employee ON department.did=employee.did;
E.
SELECT employee.name, department.dname FROM department RIGHT JOIN employee ON department.did=employee.did;
查看完整题目与答案
【多选题】要把新时代坚持和发展中国特色社会主义这场伟大社会革命进行好,我们党必须( ),把党建设得更加坚强有力。(),(),是我们党最鲜明的品格,全面从严治党永远在路上
A.
勇于进行自我革命
B.
勇于自我革命
C.
从严管党治党
查看完整题目与答案
【单选题】良性肿瘤的特点是
A.
边界清楚,常常无完整包膜,无明显异型性
B.
分化良好,无明显异型性,浸润性生长
C.
通常无包膜,与正常组织差别大,极性保持良好
D.
:分化良好,无明显异型性,和起源组织相似
查看完整题目与答案
【单选题】Hiring the right employee ________ you ________ a thousand times over in high employee morale.
A.
pays…off
B.
take…off
C.
pays…back
查看完整题目与答案
【单选题】(2019年山东省春季高考,1)--Excuse me, sir. Are you ready to order now? --Yes. I'd like two and two .
A.
hamgurger; cup of juice
B.
hamburgers; cup of juice
C.
hamburger; cups of juice
D.
hamburgers; cups of juice
查看完整题目与答案
【单选题】良性肿瘤的特点是
A.
边界清楚,常无完整包膜,无明显异型性
B.
分化良好,无明显异型性,浸润性生长
C.
和起源组织相似,核仁粗大,增多,可见病理性核分裂相
D.
通常无包膜,与正常组织差别大,极性保持良好
E.
. 分化良好,无明显异型性,和起源组织相似
查看完整题目与答案
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