肺腺癌的临床特点中，下列错误的是（）。
A.起源于支气管黏膜上皮，少数起源于大支气管的黏液腺
B.发病率比鳞癌和未分化癌低，发病年龄较小，女性多见
C.多数起源于较小的支气管，为周围型肺癌
D.淋巴转移发生早，血行转移发生晚
E.早期一般无明显临床症状，胸部X线检查时被发现
参考答案：D
解析：肺腺癌一般生长较慢，有时早期即发生血行转移，淋巴转移则发生较晚。
| 阅读理解。 | |
Linda has learned several forms of poetry. Here are some poems. First let's read them.
| |
| 1. Poem 1 is a _____. | |
| A. haiku B. five-line poem C. limerick D. none of the above | |
| 2. There are _____ syllables in Poem 1. | |
| A. 5 B. 10 C. 17 D. 20 | |
| 3. Poem 2 follows a word pattern of _____. | |
| A. 1, 2, 3, 4, 1 B. 1, 2, 3, 4, 5 C. 1, 2, 3, 2, 1 D. 1, 3, 5, 7, 9 | |
| 4. Poem 3 is a _____. | |
| A. haiku B. five-line poem C. limerick D. none of the above |