科学家最近发现2种粒子:第1种是只由四个中子构成的粒子,这种粒子称为“四中子”,

题型:选择题

问题:

科学家最近发现2种粒子:第1种是只由四个中子构成的粒子,这种粒子称为“四中子”,也有人称之为“零号元素”;第2种是由四个氧原子构成的分子。下列有关这两种粒子的说法不正确的是[ ]

A.“四中子”不显电性

B.“四中子”的质量数为4

C.第2种粒子是氧元素的另一种同位素

D.等质量的O4和O3的原子数相等

考点:同位素原子核的组成及组成粒子间的关系
题型:选择题

阅读理解。

     This is a book. It's an English book. It is my English book. That is a

dictionary. Is it Lucy's dictionary? No, it isn't. It's Tom's dictionary. Her

dictionary is in her bag. Look! What are these? They're pens. Are they

Tom's pens? No, they aren't. They are Mike's.

1. What's this? It's _______________.

2. What's that? It's _______________.

3. Is it Tom's dictionary? _______________.

4. Where is her dictionary? ______________.

5. Whose pens are those? ________________.

题型:选择题

忧郁伤神型郁证治法为()

A.疏肝理气解郁 

B.清肝泻火,解郁和胃 

C.养心安神 

D.健脾养心,益气补血 

E.滋阴清热,镇心安神

题型:选择题

6个月婴儿,发热1天,体温39℃,体检:一般情况可,咽充血,耳后淋巴结肿大,心肺无异常。如果患儿于发热第4天,热退伴皮疹出现,可能的诊断为()

A.麻疹

B.风疹

C.猩红热

D.幼儿急疹

E.水痘

题型:选择题

Oracle产品中CASE工具的名称是()。

题型:选择题

因成本自发性增加而导致物价上涨的通货膨胀是()通货膨胀。

A.需求拉上型

B.成本推进型

C.输入型

D.结构型

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