您需要webdriverwait确定元素visibility_of_element_located，然后滚动到Searchable Databasesection，然后可以使用locator xpath。
请输入：
from selenium.webdriver.support import expected_conditions
from selenium.webdriver.common.by import By
from selenium.webdriver.support.ui import webdriverwait
尝试下面的代码。
chromedriver_path = r"C:\Users\path\to\chromedriver.exe"
browser = webdriver.Chrome(executable_path=chromedriver_path)
url = "http://www.ncsl.org/research/transportation/autonomous-vehicles-legislative-database.aspx"
topics_xpath = "//div[@class='divTopicsSection1']//span//label[text()='All Topics']"
states_xpath = "//div[@class='divStatesSection1']//span//label[text()='All States']"
dBase_xpath = "//h4[text()='Searchable Database']"
browser.get(url)
webdriverwait(browser, 10).until(expected_conditions.visibility_of_element_located((By.XPATH, topics_xpath)))
elem = browser.find_element_by_xpath(dBase_xpath)
browser.execute_script("arguments[0].scrollIntoView(true);", elem)
browser.find_element_by_xpath(topics_xpath).click()
browser.find_element_by_xpath(states_xpath).click()
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