选出下列各组不同类的单词。① _1A. Sunday B. weekend C. Monday D. Tuesday② _2A. older B. teacher C. funnier D. thin_刷题宝

题干

选出下列各组不同类的单词。

① ____ A. Sunday B. weekend C. Monday D. Tuesday

② ____ A. older B. teacher C. funnier D. thinner

③ ____ A. visited B. watched C. cooked D. excited

④ ____ A. nose B. leg C. head D. toothache

⑤____ A. twelve B. fifth C. third D. first

上一题下一题 0.0难度选择题更新时间:2019-10-18 08:46:44

答案(点此获取答案解析）

B,B,D,D,A

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中微子是宇宙间的“隐身人”，是一种非常小的基本粒子，几乎不与任何物质发生作用，因此尽管每秒有上万亿个中微子穿过我们的身体，但我们很难发现它的踪影。早在1930年著名物理学家泡利(1945年诺贝尔物理学奖获得者)就预言了这种神秘粒子的存在，但科学家用了25年的时间才证实了这一预言。这主要体现了( )

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阅读下面短文，从每题所给的A、B、C和D四个选项中，选出最佳选项。

A

Safety and Security Procedures

Your safety and the security of your personal property(财产) are of the primary concern to those of us who welcome you as our guest. We urge you to take advantage of the following suggestions.

YOUR VEHICLE

Lock your vehicle and do not leave money or valuable items inside. We are not responsible for their loss.

TRAVELING

Be good at noticing things around you when sightseeing or traveling. Stay in heavily traveled areas. Don't display large amounts of cash.

GUEST ROOM SECURITY

For additional security, use the deadbolt (插锁) provided on your door and make sure the windows are locked. As an additional precautious measure, please secure the secondary locks provided. Do not admit anyone to your room without first making identification. A one-way viewer is provided in your door to assist with identification. If there is any doubt about the person's identity, please contact the Front Desk.

SAFETY BOXES

Do not leave money or valuables in your room or vehicle. We provide free safety boxes for you. We are not responsible for items left in room valued over $200.

KEYS

Safeguard your key. Please do not leave it in the door. Do not give your key to others or leave it unattended. Please leave your key at the Front Desk when you check out.

FIRE

Please familiarize yourself with the nearest fire exits. Report fire or smoke to the hotel operator. In the unlikely event of a fire, please move quickly and calmly to the nearest safe exit and leave the building. Avoid the use of the elevator.

REPORTING

Please report any suspicious activity, or safety concerns to management.

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⑴将固体混合物溶于水，搅拌后得无色透明溶液；

⑵往此溶液中滴加过量的硝酸钡溶液，有白色沉淀生成；

⑶过滤，将沉淀物置于稀硝酸中，发现沉淀部分溶解．

试判断：

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②肯定没有____，

③可能有____；

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