青年女性，咯血伴全身皮肤黏膜出血哪种疾病最不可能（）
A.急性白血病
B.风湿痛
C.流行性出血热
D.肺结核
E.肺出血型钩端螺旋体病
参考答案：D
根据课本P18 的课文内容，回答下列问题。
1. How many groups did they give talks?
_______________________________
2. What project did they talk about?
______________________________
3. What was the weather like that day?
4. When did they give the talk?
5. Who showed some physics?
地球由表及里可分为（）层。
A、地壳、地幔、地核
B、地壳、地核、地幔
C、地幔、地核、地壳
D、地核、地幔、地壳
