Snowflakes! You can catch them on your tongue (舌头) or use them to make a perfect snowball. But have you ever thought about taking pictures of them? Ken Libbrecht did. He is a physics professor from California. Although the weather in California is usually warm and sunny, Ken’s hobby is taking pictures of snowflakes. He travels to cold areas like Alaska and Canada to find snowstorms and take pictures of the snowflakes. “They are often beautiful, and every snowfall brings new surprises,” says Ken.
Ken takes pictures of snowflakes with a high-quality digital camera. He uses a microscope (显微镜) to make the tiny snowflakes larger. To get the best images, Ken built a special photo-microscope just for snowflakes. He collects flakes by letting them fall onto a piece of foam board (泡沫板).
The pictures must be taken outdoors, so Ken wears lots of clothes to stay warm. But his fingers often get cold, because it’s difficult for him to take pictures of a tiny snowflake with gloves.
Each snowflake has shapes and patterns (图案) that make it as unique (独特的) as a person’s fingerprint. The hobby of snowflake photography is also unique. Next time a snowstorm blows through your town, take a closer look at the flakes before you gather them into a snowball. See if you can notice their unique patterns. Millions of snowflakes are waiting for you!
根据材料内容选择最佳答案，并将其标号填入题前括号内。
What’s the weather in Ken Libbrecht’s hometown usually like?

A．Cold and snowy.	B．Windy and rainy.
C．Warm and sunny.	D．Cloudy and foggy.

Which of the following isn’t used when Ken works with snowflakes?

A．A snowball.

B．A digital camera.

C．A microscope.

D．A piece of foam board.

Why do Ken’s fingers often get cold?

A．Because he doesn’t wear enough clothes.

B．Because he doesn’t wear gloves.

C．Because he likes making snowballs.

D．Because there is something wrong with his fingers.

Which of the following statements is TRUE?

A．It’s always warm in Canada.

B．Ken often works with a tiny snowflake at home.

C．Ken wears thick gloves when he works outside.

D．Every snowflake is different from the other one.

What does the passage mainly tell us?

A．What we can do with snowflakes.

B．Some beautiful pictures of snowflakes.

C．Ken Libbrecht’s snowflake photography.

D．The unique patterns of snowflakes.