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【单选题】
Washington, D.C. Bicycle Tours Cherry Blossom Bike Tour in Washington, D.C. Duration Tour This small group bike tour is a fantastic way to see the world-famous cherry trees with beautiful flowers of Washington, D.C. Your guide will provide a history lesson about the trees and the famous monuments where they blossom. Reserve your spot before availability — the cherry blossoms—disappear! Washington Capital Monuments Bicycle Tour Duration:3 hours (4 miles) Join a guided bike tour and view some of the most popular monuments in Washington, D.C. Explore the monuments and memorials on the National Mall as your guide shares unique facts and history at each stop. Guided tour includes bike, helmet, cookies and bottled water. Capital City Bike Tour In Washington, D.C. Duration:3 hours Morning or Afternoon, this bike tour is the perfect tour for D. C. newcomers and locals looking to experience Washington, D.C. in a healthy way with minimum effort. Knowledgeable guides will entertain you with the most interesting stories about Presidents, Congress, memorials, and parks. Comfortable bikes and a smooth tour route( 路线) make cycling between the sites fun and relaxing. Washington Capital Sites at Night Bicycle Tour Duration:3 hours(7miles) Join a small group bike tour for an evening of exploration in the heart of Washington, D.C. Get up close to the monuments and memorials as you bike the sites of Capitol Hill and the National Mall. Frequent stops are made for photo taking as your guide offers unique facts and history. Tour includes bike, helmet, and bottled water. All riders are equipped with reflective vests and safety lights. 21.Which tour do you need to book in advance?
A.
Cherry Blossom like Tour in Washington, D.C.
B.
Washington capital Monuments Bicycle Tour.
C.
Capital City Bike Tour in Washington, D.C.
D.
Washington Capital Sites at Night Bicycle Tour.
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【单选题】核糖核苷酸还原酶催化下列反应( )
A.
ATP—dATP
B.
ADP—dADP
C.
AMP—dAMP
D.
UTP—dUTP
【单选题】All kinds of people describe themselves as shy. Which of the following can not replace “describe”?
A.
regard
B.
view
C.
label
D.
associate
【单选题】医生检查一名42岁患者的疲劳的原因。发现其白细胞计数升高和脾脏肿大。肿瘤科医生诊断为慢性粒细胞性白血病。开始用羟基脲(一种核糖核苷酸还原酶抑制剂)治疗。核糖核苷酸还原酶催化下列哪一个反应?
A.
催化腺苷二磷酸和核糖形成磷酸核糖焦磷酸PRPP
B.
催化黄嘌呤转变成尿酸
C.
催化谷氨酰胺、CO2、 ATP形成氨基甲酰磷酸
D.
催化ADP转换为dADP
E.
将鸟苷转变为鸟嘌呤和核糖核苷-1-磷酸
【单选题】恶性黑色素瘤,以下哪项说法,不正确
A.
黑色素瘤多数是在色素病变基础上发生的
B.
正常皮肤也可以发生黑色素瘤
C.
黑色素瘤主要经血液转移至肺、骨等器官
D.
最佳治疗方案是外科手术切除
E.
黑色素瘤可以有家族史
【单选题】国际收支平衡表的平衡项目是指 ——
A.
经常项目
B.
资本项目
C.
金融项目
D.
错误与遗漏
【单选题】下列哪项说法不正确( )。
A.
空场采矿法一般适用于开采矿岩稳固的矿体
B.
崩落采矿法不适用于地表允许陷落
C.
非煤采矿法未来的发展是充填增加,崩落增加,空场减少
D.
以上说法都不正确
【判断题】Only certain kinds of people describe themselves as shy.
A.
正确
B.
错误
【单选题】What is the purpose of the author in writing the passage?
A.
To describe different kinds of phobias.
B.
To expound phobia and their possible treatments.
C.
To help the phobia sufferers to get better.
D.
To tell readers how to prevent such phobias.
【判断题】已完成销售手续但购买方在月末仍未提取的产品,应视为企业的库存商品
A.
正确
B.
错误
【单选题】国际收支平衡表的平衡项目是指
A.
经常项目
B.
金融项目
C.
资本项目
D.
错误与遗漏
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