皮皮学，免费搜题
登录
搜题
【单选题】
下列关于奇脉的描述哪项正确?
A.
吸气时脉搏增加
B.
吸气时脉搏减弱甚至消失
C.
有脉律不规则
D.
常见于主动脉瓣关闭不全
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
.
..
皮皮学刷刷变学霸
举一反三
【单选题】下列关于藻类植物的描述中，正确的是（ ）
A.
藻类植物有多细胞的，也有多细胞的
B.
藻类植物都是没有根、茎、叶分化的多细胞植物
C.
海生藻类不能进行光合作用
D.
藻类植物都生活在海洋中
查看完整题目与答案
【单选题】M: What happened to you? You are so late. W: The bus I took broke down in front of the hospital, and I had to walk from there. 21. Why was the woman so late?
A.
Something went wrong with the bus.
B.
She took somebody to hospital.
C.
She didn't catch the bus.
D.
She started too late.
查看完整题目与答案
【单选题】广益田径场西侧有条水沟，同学们课后常去抓小虾，下列有关该水沟描述正确的是（　　）
A.
同学是影响小虾生活的生物因素之一
B.
该水沟中的小虾属于软体动物
C.
水沟中的所有植物均为藻类植物
D.
该生态系统由生产者、消费者、分解者组成
查看完整题目与答案
【单选题】Why was the woman able to give Laura so much information about the job?
A.
She is Prof. Nelson' s daughter.
B.
She works part-time as Prof. Nelson' s secretary.
C.
She used to do the job herself.
D.
She just came out of an interview for the job.
查看完整题目与答案
【单选题】下列关于植物类群特征正确的描述是
A.
从苔藓植物开始植物出现真正的根、茎、叶
B.
苔藓、蕨类和种子植物都为维管束植物
C.
藻类和苔藓都为单细胞生物
D.
种子植物的成熟胚囊、成熟花粉粒分别为雌、雄配子体
查看完整题目与答案
【单选题】Why was the old woman in the villege so excited
A.
Because Emily showed her a great treasure.
B.
Because Emily helped her win a big prize.
C.
Because Emily gave her an empty bottle.
D.
Because Emily gave her a bottle of wine.
查看完整题目与答案
【单选题】下列关于藻类、苔藓、蕨类这三种植物的共同点描述正确的是( )。
A.
它们均生活在阴暗潮湿的环境当中
B.
根吸收的水分均可以靠导管运输至叶片部分
C.
生殖方式属于无性生殖，靠孢子繁殖
D.
叶片由一层单细胞构成，可以作为空气检测剂
查看完整题目与答案
【多选题】关于藻类植物描述正确的是( )
A.
构造简单，无根茎叶分化
B.
多为单细胞、多细胞群体、丝状体、叶状体和枝状体等
C.
异养生物
D.
无胚植物
查看完整题目与答案
【单选题】Why was the old woman in the village so excited?
A.
Because Emily showed her a great treasure.
B.
Because Emily helped her win a big prize.
C.
Because Emily gave her an empty bottle.
D.
Because Emily gave her a bottle of wine.
查看完整题目与答案
【单选题】Which of the following sentences is an opinion rather than a fact?
A.
Hundreds of occupational names are at once familiar to us.
B.
Blackand 'White' implied'dark' and 'fair' respectively.
C.
Vocational names carry with them a certain gravity and dignity.
D.
Every place in England has given its name to a family.
查看完整题目与答案
相关题目：
【单选题】下列关于藻类植物的描述中，正确的是（ ）
A.
藻类植物有多细胞的，也有多细胞的
B.
藻类植物都是没有根、茎、叶分化的多细胞植物
C.
海生藻类不能进行光合作用
D.
藻类植物都生活在海洋中
查看完整题目与答案
【单选题】M: What happened to you? You are so late. W: The bus I took broke down in front of the hospital, and I had to walk from there. 21. Why was the woman so late?
A.
Something went wrong with the bus.
B.
She took somebody to hospital.
C.
She didn't catch the bus.
D.
She started too late.
查看完整题目与答案
【单选题】广益田径场西侧有条水沟，同学们课后常去抓小虾，下列有关该水沟描述正确的是（　　）
A.
同学是影响小虾生活的生物因素之一
B.
该水沟中的小虾属于软体动物
C.
水沟中的所有植物均为藻类植物
D.
该生态系统由生产者、消费者、分解者组成
查看完整题目与答案
【单选题】Why was the woman able to give Laura so much information about the job?
A.
She is Prof. Nelson' s daughter.
B.
She works part-time as Prof. Nelson' s secretary.
C.
She used to do the job herself.
D.
She just came out of an interview for the job.
查看完整题目与答案
【单选题】下列关于植物类群特征正确的描述是
A.
从苔藓植物开始植物出现真正的根、茎、叶
B.
苔藓、蕨类和种子植物都为维管束植物
C.
藻类和苔藓都为单细胞生物
D.
种子植物的成熟胚囊、成熟花粉粒分别为雌、雄配子体
查看完整题目与答案
【单选题】Why was the old woman in the villege so excited
A.
Because Emily showed her a great treasure.
B.
Because Emily helped her win a big prize.
C.
Because Emily gave her an empty bottle.
D.
Because Emily gave her a bottle of wine.
查看完整题目与答案
【单选题】下列关于藻类、苔藓、蕨类这三种植物的共同点描述正确的是( )。
A.
它们均生活在阴暗潮湿的环境当中
B.
根吸收的水分均可以靠导管运输至叶片部分
C.
生殖方式属于无性生殖，靠孢子繁殖
D.
叶片由一层单细胞构成，可以作为空气检测剂
查看完整题目与答案
【多选题】关于藻类植物描述正确的是( )
A.
构造简单，无根茎叶分化
B.
多为单细胞、多细胞群体、丝状体、叶状体和枝状体等
C.
异养生物
D.
无胚植物
查看完整题目与答案
【单选题】Why was the old woman in the village so excited?
A.
Because Emily showed her a great treasure.
B.
Because Emily helped her win a big prize.
C.
Because Emily gave her an empty bottle.
D.
Because Emily gave her a bottle of wine.
查看完整题目与答案
【单选题】Which of the following sentences is an opinion rather than a fact?
A.
Hundreds of occupational names are at once familiar to us.
B.
Blackand 'White' implied'dark' and 'fair' respectively.
C.
Vocational names carry with them a certain gravity and dignity.
D.
Every place in England has given its name to a family.
查看完整题目与答案