1. [单选题]减数分裂发生在( )的过程。
A. 花粉母细胞→小孢子
B. 造孢细胞→花粉母细胞
C. 孢原细胞(archesporial cell)→造孢细胞
D. 造孢细胞→小孢子
2. [单选题]簇生叶序是每个节上生3枚或3枚以上的叶。( )
A. 正确
B. 错误
3. [单选题]CA volcanic eruption in Iceland has sent ash across northern Europe. Airlines have stopped or changed the flights across the Atlantic Ocean, leaving hundreds of passengers stuck in airports.
A. Grirmsvom is one of the largest and most active volcanoes in Europe. What makes Grimsvom different is that it lies under a huge glacier（冰川） of ice up to 12 maters thick. The hot volcano heats up the ice above it, which then forms a layer（层）of water between the glacier and the volcano This layer of water puts pressure on the volcano, keeping it stable, As the water flows out from under the glacier, the pressure lifts. The lava（岩浆） from the volcano then comes up to the surface. This is exactly what happened today.
B. Now, airlines have to make changes to their flights so as not to fly through the clouds of volcanic ash. According to KLM. one of Europe’s biggest airlines, airplanes cannot go under the cloud or over it. Going through the cloud can result in ash getting stuck in the airplane’s engines, causing damage to the plane.
C. The eruption has also caused problems for animals in Iceland. The volcano left ash and sharp. Glass-like rocks all over the countryside. Farmers are keeping their animals inside to stop them from eating ash- covered grass to the sharp object.
D. 64. What makes Grimsvom different from other volcanoes?
E. It is below ice.
F. It lies under the sea
G. It is the largest volcano
H. It is lava affects the airlines
4. [单选题]我国稻属植物有四种，其中( )为栽培种。
A. Oryza sativa
B. Oryza rufipogon
C. Oryza officinalis
D. Oryza granulata
5. [单选题]五倍子是指( )。
A. 盐肤木等寄生植物(parasitic plant)
B. 盐肤木等枝叶上的虫瘿
C. 寄生虫
D. 药用成分
