下列说法中正确的是( ) A.眼是视觉器官,当物体投射在视网膜上时,就产生了视觉

题型:选择题

问题:

下列说法中正确的是(  )

A.眼是视觉器官,当物体投射在视网膜上时,就产生了视觉

B.读写时最好将眼睛与书本的距离控制在33-35厘米(一尺)

C.连续操作电脑40-50分钟后,可看一会儿电视,以便休息一下眼睛

D.通过瞳孔大小的调节,可控制进入眼内光亮度的强弱,所以看电视时光亮度的强弱不会对视力产生影响

考点:近视和远视眼和视觉
题型:选择题

某同学发现了一株花色奇特的杜鹃花,于是采摘了部分枝条,欲使用生长素促其生根进行繁殖。在探究促进生根的最适生长素浓度的实验中,不正确的是[ ]

A.采摘的枝条中,芽较多的一年生枝条相对来说更容易生根

B.实验中不同浓度的生长素溶液浸泡不同枝条的时间长短应有一定的梯度

C.在正式实验前应先做预实验

D.该实验的因变量是枝条生根的数量

题型:选择题

该图是极地为中心的某半球气压带、风带分布示意图(箭头表示风向),判断问题。

小题1:图中风带⑥是

A.北半球西风带

B.南半球西风带

C.北半球信风带

D.南半球信风带小题2:当①气压带在此半球分布面积最小时,可能发生的地理现象是

A.地球公转速度较慢

B.昼长上海大于广州

C.巴西高原上草木茂盛

D.恒河流域正值丰水期

题型:选择题

In the dining room of my grandfather’s house stood his heavy dock. Meals in the dining room were a (16) for our four generations to become one. My grandfather’s clock always stood like a trusted old family friend, (17) us playing jokes and telling stories, which was already a (18) of our life.
When I was a child, the old clock interested me. I watched and listened to it during (19) I was surprised how at (20) times of the day, the clock would strike three times, six times or more, with a wonderful great (21) that echoed throughout the house. The clock chimed year after year, a part of my (22) , a part of my heart.
Even more (23) to me was my grandfather’s special action each day. He meticulously (24) the clock with a special key each day. The key was magic to me. It (25) our family’s magnificent clock ticking and striking all year round.

Ⅱ.完型填空/Cloze

A.busy

B.urgent

C.happy

D.different

题型:选择题

脓漏眼多由下列哪种细菌引起()

A.肺炎双球菌

B.腺病毒

C.脑膜炎双球菌

D.葡萄球菌

E.淋病奈瑟菌

题型:选择题

其性能主要取决于特征速度、折转半径与折转角度,可用于收集大于20μm粒径尘粒的除尘器是 ()除尘器。

A.惯性

B.湿式

C.旋风

D.过滤式

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